LNER Pacifics
Encyclopedia
The London and North Eastern Railway
London and North Eastern Railway
The London and North Eastern Railway was the second-largest of the "Big Four" railway companies created by the Railways Act 1921 in Britain...

 (LNER) operated various classes steam locomotives with a 4-6-2
4-6-2
4-6-2, in the Whyte notation for the classification of steam locomotives, represents the wheel arrangement of four leading wheels on two axles , six powered and coupled driving wheels on three axles, and two trailing wheels on one axle .These locomotives are also known as Pacifics...

 (or pacific) wheel arrangement
Wheel arrangement
In rail transport, a wheel arrangement is a system of classifying the way in which wheels are distributed beneath a locomotive.. Several notations exist to describe the wheel assemblies of a locomotive by type, position, and connections, with the adopted notations varying by country...

. The LNER operated more pacifics than any other of the Big Four British railway companies
Big Four British railway companies
The Big Four was a name used to describe the four largest railway companies in the United Kingdom in the period 1923-1947. The name was coined by the Railway Magazine in its issue of February 1923: "The Big Four of the New Railway Era".The Big Four were:...

, and they were mostly used for express passenger work along the East Coast Main Line
East Coast Main Line
The East Coast Main Line is a long electrified high-speed railway link between London, Peterborough, Doncaster, Wakefield, Leeds, York, Darlington, Newcastle and Edinburgh...

, though later in their lives many were displaced to other lines.

Overview

In 1923, the LNER inherited four pacifics, to two classes each consisting of two locomotives, one class from either of two of its constituents, the Great Northern Railway
Great Northern Railway (Great Britain)
The Great Northern Railway was a British railway company established by the Great Northern Railway Act of 1846. On 1 January 1923 the company lost its identity as a constituent of the newly formed London and North Eastern Railway....

 (GNR) and the North Eastern Railway
North Eastern Railway (UK)
The North Eastern Railway , was an English railway company. It was incorporated in 1854, when four existing companies were combined, and was absorbed into the London and North Eastern Railway at the Grouping in 1923...

 (NER). The Great Northern Pacifics, were of GNR Class A1, designed by Nigel Gresley
Nigel Gresley
Sir Herbert Nigel Gresley was one of Britain's most famous steam locomotive engineers, who rose to become Chief Mechanical Engineer of the London and North Eastern Railway . He was the designer of some of the most famous steam locomotives in Britain, including the LNER Class A1 and LNER Class A4...

 and numbered 1470/1. The NER had completed two Pacifics, Nos 2400/1, designed by Vincent Raven
Vincent Raven
Sir Vincent Litchfield Raven KBE was chief mechanical engineer of the North Eastern Railway from 1910 to 1922.- Biography :...

. The LNER adopted the GNR classification system by wheel arrangement, with the A-prefix indicating the most prestigious wheel arrangement. The GNR Class A1s remained Class A1 and the NER pacifics were reclassified A2.

The LNER also classified pacific tank engines with A-numbers, and these were initially classified A5-7, and were eventually joined by a class A8. However, because of their different lineage and operational use, they are not further considered here.

The LNER completed an additional three A2s in 1924. In 1929 2404 City of Ripon was fitted with a modified A1 boiler, but otherwise the A2s bore little resemblance to the remaining LNER pacifics which were the continued evolution of the same basic Gresley design. The Raven Class A2s were all withdrawn from stock in 1936/7, freeing the A2 designation for later reuse.

Comparisons between the A1 and A2s revealed the A1s to be superior, so they were selected for more building. A total of 52 A1s were eventually built. From 1928, the A1s were started to be fitted with a higher pressure superheated boiler. This reboilering took them into Class A3, and eventually all but one of the 52 A1s would be rebuilt to Class A3, the process taking until 1948. In addition, a total of 23 new A3s (Nos 2743-51, 2595-9, 2500-8) were built.

In 1929 a single experimental Class W1
LNER Class W1
The LNER W1 No. 10000 was an experimental steam locomotive fitted with a high pressure water-tube boiler...

 "Hush-Hush" locomotive was constructed. The W1 was rebuilt in 1936 to a more conventional 4-6-4, retaining its W1 classification. Although not technically not a Pacific, but a Hudson
4-6-4
Under the Whyte notation for the classification of steam locomotives, 4-6-4 represents the wheel arrangement of four leading wheels on two axles , six powered and coupled driving wheels on three axles, and four trailing wheels on two axles .Other equivalent classifications are:UIC classification:...

, there were many engineering similarities and operationally it shared similar duties.

The next class to be introduced was the Class A4
LNER Class A4
The Class A4 is a class of streamlined 4-6-2 steam locomotive, designed by Nigel Gresley for the London and North Eastern Railway in 1935. Their streamlined design gave them high-speed capability as well as making them instantly recognizable, and one of the class, 4468 Mallard, still claims the...

 in 1935. A total of 35 were built. These were streamlined. One was destroyed during the war.

Post-war, the initially straightforward classification system for LNER pacifics started to break down. In 1945, Edward Thompson
Edward Thompson (engineer)
Edward Thompson was Chief Mechanical Engineer of the London and North Eastern Railway between 1941 and 1946.- Biography :Edward Thompson was the son of an assistant master at Marlborough College. He was educated at Marlborough before taking the Mechanical Science Tripos at Pembroke College,...

 rebuilt the first A1 Great Northern. This was initially kept classified A1 and the few remaining A1s were reclassified A10. The intention was always to rebuilt the remaining A10s into A1s, however this was not done as the rebuild was not successful and they were instead rebuilt to A3s; the Class A10 becoming extinct in 1948. Instead, a brand new class of 49 Peppercorn Class A1s
LNER Peppercorn Class A1
The London and North Eastern Railway Peppercorn Class A1 is a type of express passenger steam locomotive. Forty-nine original Peppercorn Class A1s were built to the design of Arthur Peppercorn during the early British Railways era, but all were scrapped with the discontinuation of steam,...

 were introduced in 1948/9, and in anticipation of these Great Northern was reclassified as Class A1/1
LNER Thompson Class A1/1
The London and North Eastern Railway Thompson Class A1/1 was started in 1945 when a Class A1 went into the works for rebuilding in to the A1/1....

 in 1947.

In 1943 and 1944 Thompson also rebuilt the Class P2s
LNER Class P2
The London and North Eastern Railway Class P2 was a class of 2-8-2 steam locomotives designed by Sir Nigel Gresley for working heavy express trains over the harsh Edinburgh to Aberdeen Line...

 into Class A2/2s
LNER Thompson Class A2/2
The London and North Eastern Railway Class A2/2 was a class of 4-6-2 steam locomotives. The A2/2 were former members of Sir Nigel Gresley’s P2 Class of eight-coupled express passenger locomotives. Edward Thompson was appointed on the 28 April 1941 and decided to gain experience by rebuilding the...

. In 1944, Thompson built another subclass when another subclass of A2s originally ordered as V2s
LNER Class V2
The London and North Eastern Railway Class V2 2-6-2 steam locomotives were designed by Sir Nigel Gresley for express mixed traffic work, and built between 1936–1944. The best known is the first of the class, 4771 Green Arrow, which is the only preserved example.-Construction:The V2s were the only...

, these being the LNER Thompson Class A2/1
LNER Thompson Class A2/1
The London and North Eastern Railway Thompson Class A2/1 was a class of 4-6-2 steam locomotives. They were originally ordered as Class V2 locomotives, as designed by Sir Nigel Gresley, but were revised during construction into a 4-6-2 'Pacific' arrangement under the instruction of Edward Thompson...

. Another fifteen new engines were built to a third design and classified A2/3
LNER Thompson Class A2/3
The London and North Eastern Railway Class A2/3 was a class of 4-6-2 steam locomotives.They were newly constructed locomotives, fulfilling the requirement identified by Edward Thompson for a standard express passenger locomotive of the 4-6-2 arrangement with 6ft 2in driving wheels...

.

Under the LNER's 1946 renumbering scheme, the Class A4s were given the lowest (i.e. most prestigious) numbers 1-34. The A3s and few remaining A10s were renumbered 35-112 and the Thompson A1/1 Great Northern became No. 113. The Thompson A2s were given 1946 numbers from rebuilding. The A2/1 becoming 507-10, A2/2 501-6, and the A2/3 becoming 500/11-24. A single Peppercorn Class A2, No. 525, was completed before nationalisation in 1948, but a further 6 were given LNER numbers (Nos 526-31) before BR decided on a numbering system. BR then added 60000 to all LNER pacific numbers, though it took a while to apply these. The remaining Peppercorn Class A2s received their BR numbers 60532-9 from new, as did the LNER Peppercorn Class A1s which were numbered 60114-62.

Withdrawal

Excluding the Raven Class A2s, and one A4 which was destroyed by bombing during the war, British Railways withdrew the LNER Pacifics from stock between 1959 and 1966. The W1
LNER Class W1
The LNER W1 No. 10000 was an experimental steam locomotive fitted with a high pressure water-tube boiler...

 (technically not a pacific by wheel arrangement but sharing many features) was withdrawn in 1959.
Summary of Withdrawals by BR
YearA1/1
LNER Thompson Class A1/1
The London and North Eastern Railway Thompson Class A1/1 was started in 1945 when a Class A1 went into the works for rebuilding in to the A1/1....

Class A1
LNER Peppercorn Class A1
The London and North Eastern Railway Peppercorn Class A1 is a type of express passenger steam locomotive. Forty-nine original Peppercorn Class A1s were built to the design of Arthur Peppercorn during the early British Railways era, but all were scrapped with the discontinuation of steam,...

Class A2/1
LNER Thompson Class A2/1
The London and North Eastern Railway Thompson Class A2/1 was a class of 4-6-2 steam locomotives. They were originally ordered as Class V2 locomotives, as designed by Sir Nigel Gresley, but were revised during construction into a 4-6-2 'Pacific' arrangement under the instruction of Edward Thompson...

Class A2/2
LNER Thompson Class A2/2
The London and North Eastern Railway Class A2/2 was a class of 4-6-2 steam locomotives. The A2/2 were former members of Sir Nigel Gresley’s P2 Class of eight-coupled express passenger locomotives. Edward Thompson was appointed on the 28 April 1941 and decided to gain experience by rebuilding the...

Class A2/3
LNER Thompson Class A2/3
The London and North Eastern Railway Class A2/3 was a class of 4-6-2 steam locomotives.They were newly constructed locomotives, fulfilling the requirement identified by Edward Thompson for a standard express passenger locomotive of the 4-6-2 arrangement with 6ft 2in driving wheels...

Class A2
LNER Peppercorn Class A2
The London and North Eastern Railway Peppercorn Class A2 is a class of steam locomotive designed for express passenger work by Arthur Peppercorn, the chief designer of the LNER after Edward Thompson...

Class A3Class A4
LNER Class A4
The Class A4 is a class of streamlined 4-6-2 steam locomotive, designed by Nigel Gresley for the London and North Eastern Railway in 1935. Their streamlined design gave them high-speed capability as well as making them instantly recognizable, and one of the class, 4468 Mallard, still claims the...

Total
1959 0 0 0 2 0 0 1 0 3
1960 0 0 3 3 0 0 0 0 6
1961 0 0 1 1 0 0 6 0 8
1962 1 6 0 0 8 8 13 4 40
1963 0 6 0 0 4 2 33 11 56
1964 0 11 0 0 0 0 23 7 41
1965 0 24 0 0 3 2 2 6 37
1966 0 2 0 0 0 3 1 6 12
Total 1 49 4 6 15 15 79 34 203

Preservation

A total of eight original LNER pacifics have been preserved; six of these are A4s (of which two are in North America
North America
North America is a continent wholly within the Northern Hemisphere and almost wholly within the Western Hemisphere. It is also considered a northern subcontinent of the Americas...

), one A3 and one Peppercorn A2.
Preserved LNER pacifics
LNER No. LNER 1946 No. BR No. Name Class
4498
LNER Class A4 4498 Sir Nigel Gresley
London and North Eastern Railway A4 Class number 4498 , 7 and 60007 , namedSir Nigel Gresley is a preserved British steam locomotive.-Liveries:...

7
LNER Class A4 4498 Sir Nigel Gresley
London and North Eastern Railway A4 Class number 4498 , 7 and 60007 , namedSir Nigel Gresley is a preserved British steam locomotive.-Liveries:...

60007
LNER Class A4 4498 Sir Nigel Gresley
London and North Eastern Railway A4 Class number 4498 , 7 and 60007 , namedSir Nigel Gresley is a preserved British steam locomotive.-Liveries:...

Sir Nigel Gresley A4
LNER Class A4
The Class A4 is a class of streamlined 4-6-2 steam locomotive, designed by Nigel Gresley for the London and North Eastern Railway in 1935. Their streamlined design gave them high-speed capability as well as making them instantly recognizable, and one of the class, 4468 Mallard, still claims the...

North Yorkshire Moors Railway
North Yorkshire Moors Railway
The North Yorkshire Moors Railway is a heritage railway in North Yorkshire, England. First opened in 1836 as the Whitby and Pickering Railway, the railway was planned in 1831 by George Stephenson as a means of opening up trade routes inland from the then important seaport of Whitby. The line...

4496
LNER Class A4 4496 Dwight D Eisenhower
60008 Dwight D Eisenhower is an LNER Class A4 steam locomotive.Built for the London and North Eastern Railway in 1937, this locomotive was originally numbered 4496 and named Golden Shuttle. It was renamed Dwight D. Eisenhower after the Second World War and renumbered 8 on 23 November 1946 under...

8
LNER Class A4 4496 Dwight D Eisenhower
60008 Dwight D Eisenhower is an LNER Class A4 steam locomotive.Built for the London and North Eastern Railway in 1937, this locomotive was originally numbered 4496 and named Golden Shuttle. It was renamed Dwight D. Eisenhower after the Second World War and renumbered 8 on 23 November 1946 under...

60008
LNER Class A4 4496 Dwight D Eisenhower
60008 Dwight D Eisenhower is an LNER Class A4 steam locomotive.Built for the London and North Eastern Railway in 1937, this locomotive was originally numbered 4496 and named Golden Shuttle. It was renamed Dwight D. Eisenhower after the Second World War and renumbered 8 on 23 November 1946 under...

Dwight D Eisenhower A4
LNER Class A4
The Class A4 is a class of streamlined 4-6-2 steam locomotive, designed by Nigel Gresley for the London and North Eastern Railway in 1935. Their streamlined design gave them high-speed capability as well as making them instantly recognizable, and one of the class, 4468 Mallard, still claims the...

National Railroad Museum
National Railroad Museum
The National Railroad Museum is a railroad museum located in Ashwaubenon, Wisconsin, in suburban Green Bay.The museum is one of the oldest institutions in the United States dedicated to preserving and interpreting the nation's railroad history. It was founded in 1956 by community volunteers in...

, Green Bay
Green Bay, Wisconsin
Green Bay is a city in and the county seat of Brown County in the U.S. state of Wisconsin, located at the head of Green Bay, a sub-basin of Lake Michigan, at the mouth of the Fox River. It has an elevation of above sea level and is located north of Milwaukee. As of the 2010 United States Census,...

, Wisconsin
Wisconsin
Wisconsin is a U.S. state located in the north-central United States and is part of the Midwest. It is bordered by Minnesota to the west, Iowa to the southwest, Illinois to the south, Lake Michigan to the east, Michigan to the northeast, and Lake Superior to the north. Wisconsin's capital is...

Static display
4488
LNER Class A4 4488 Union of South Africa
60009 Union of South Africa is an LNER Class A4 steam locomotive built in Doncaster in 1937. Originally named Osprey, it is one of six surviving Gresley A4s and is presently undergoing an extensive overhaul.-Names:...

9
LNER Class A4 4488 Union of South Africa
60009 Union of South Africa is an LNER Class A4 steam locomotive built in Doncaster in 1937. Originally named Osprey, it is one of six surviving Gresley A4s and is presently undergoing an extensive overhaul.-Names:...

60009
LNER Class A4 4488 Union of South Africa
60009 Union of South Africa is an LNER Class A4 steam locomotive built in Doncaster in 1937. Originally named Osprey, it is one of six surviving Gresley A4s and is presently undergoing an extensive overhaul.-Names:...

Union of South Africa
Union of South Africa
The Union of South Africa is the historic predecessor to the present-day Republic of South Africa. It came into being on 31 May 1910 with the unification of the previously separate colonies of the Cape, Natal, Transvaal and the Orange Free State...

A4
LNER Class A4
The Class A4 is a class of streamlined 4-6-2 steam locomotive, designed by Nigel Gresley for the London and North Eastern Railway in 1935. Their streamlined design gave them high-speed capability as well as making them instantly recognizable, and one of the class, 4468 Mallard, still claims the...

Based at Thornton, Fife
Thornton, Fife
Thornton is a village in Fife, Scotland. It is between Kirkcaldy and Glenrothes, and stands between the River Ore and Lochty Burn, which are at opposite ends of the main street.- Transport :...

Approved for mainline use
4489
LNER Class A4 4489 Dominion of Canada
60010 Dominion of Canada is an LNER Class A4 steam locomotive. She is a 4-6-2 locomotive built to the same design by Sir Nigel Gresley as the more famous Mallard. There were 35 A4 locomotives built in total...

10
LNER Class A4 4489 Dominion of Canada
60010 Dominion of Canada is an LNER Class A4 steam locomotive. She is a 4-6-2 locomotive built to the same design by Sir Nigel Gresley as the more famous Mallard. There were 35 A4 locomotives built in total...

60010
LNER Class A4 4489 Dominion of Canada
60010 Dominion of Canada is an LNER Class A4 steam locomotive. She is a 4-6-2 locomotive built to the same design by Sir Nigel Gresley as the more famous Mallard. There were 35 A4 locomotives built in total...

Dominion of Canada A4
LNER Class A4
The Class A4 is a class of streamlined 4-6-2 steam locomotive, designed by Nigel Gresley for the London and North Eastern Railway in 1935. Their streamlined design gave them high-speed capability as well as making them instantly recognizable, and one of the class, 4468 Mallard, still claims the...

Canadian Railway Museum
Canadian Railway Museum
The Canadian Railway Museum Musée Ferrovaire Canadien) is a rail transport museum in Delson/Saint-Constant, Quebec south of Montreal.-Collection:...

Static display
4464
LNER Class A4 4464 Bittern
4464 Bittern is a London and North Eastern Railway Class A4 steam locomotive. Built for the LNER in 1937 at Doncaster Works as works number 1866, it was originally numbered 4464. It was renumbered 19 on 16 August 1946 under the LNER 1946 renumbering scheme and after nationalisation in 1948 BR added...

19
LNER Class A4 4464 Bittern
4464 Bittern is a London and North Eastern Railway Class A4 steam locomotive. Built for the LNER in 1937 at Doncaster Works as works number 1866, it was originally numbered 4464. It was renumbered 19 on 16 August 1946 under the LNER 1946 renumbering scheme and after nationalisation in 1948 BR added...

60019
LNER Class A4 4464 Bittern
4464 Bittern is a London and North Eastern Railway Class A4 steam locomotive. Built for the LNER in 1937 at Doncaster Works as works number 1866, it was originally numbered 4464. It was renumbered 19 on 16 August 1946 under the LNER 1946 renumbering scheme and after nationalisation in 1948 BR added...

Bittern
Bittern
Bitterns are a classification of birds in the heron family, Ardeidae, a family of wading birds. Species named bitterns tend to be the shorter-necked, often more secretive members of this family...

A4
LNER Class A4
The Class A4 is a class of streamlined 4-6-2 steam locomotive, designed by Nigel Gresley for the London and North Eastern Railway in 1935. Their streamlined design gave them high-speed capability as well as making them instantly recognizable, and one of the class, 4468 Mallard, still claims the...

Mid Hants Watercress Railway Approved for mainline use
4468
LNER Class A4 4468 Mallard
Number 4468 Mallard is a London and North Eastern Railway Class A4 4-6-2 Pacific steam locomotive built at Doncaster, England in 1938. While in other respects a relatively typical member of its class, it is historically significant for being the holder of the official world speed record for steam...

22
LNER Class A4 4468 Mallard
Number 4468 Mallard is a London and North Eastern Railway Class A4 4-6-2 Pacific steam locomotive built at Doncaster, England in 1938. While in other respects a relatively typical member of its class, it is historically significant for being the holder of the official world speed record for steam...

60022
LNER Class A4 4468 Mallard
Number 4468 Mallard is a London and North Eastern Railway Class A4 4-6-2 Pacific steam locomotive built at Doncaster, England in 1938. While in other respects a relatively typical member of its class, it is historically significant for being the holder of the official world speed record for steam...

Mallard
Mallard
The Mallard , or Wild Duck , is a dabbling duck which breeds throughout the temperate and subtropical Americas, Europe, Asia, and North Africa, and has been introduced to New Zealand and Australia....

A4
LNER Class A4
The Class A4 is a class of streamlined 4-6-2 steam locomotive, designed by Nigel Gresley for the London and North Eastern Railway in 1935. Their streamlined design gave them high-speed capability as well as making them instantly recognizable, and one of the class, 4468 Mallard, still claims the...

National Railway Museum
National Railway Museum
The National Railway Museum is a museum in York forming part of the British National Museum of Science and Industry and telling the story of rail transport in Britain and its impact on society. It has won many awards, including the European Museum of the Year Award in 2001...

, York
York
York is a walled city, situated at the confluence of the Rivers Ouse and Foss in North Yorkshire, England. The city has a rich heritage and has provided the backdrop to major political events throughout much of its two millennia of existence...

Static display
4472
LNER Class A3 4472 Flying Scotsman
The LNER Class A3 Pacific locomotive No. 4472 Flying Scotsman was built in 1923 for the London and North Eastern Railway at Doncaster Works to a design of H.N. Gresley...

103
LNER Class A3 4472 Flying Scotsman
The LNER Class A3 Pacific locomotive No. 4472 Flying Scotsman was built in 1923 for the London and North Eastern Railway at Doncaster Works to a design of H.N. Gresley...

60103
LNER Class A3 4472 Flying Scotsman
The LNER Class A3 Pacific locomotive No. 4472 Flying Scotsman was built in 1923 for the London and North Eastern Railway at Doncaster Works to a design of H.N. Gresley...

Flying Scotsman A3
- - 60532 Blue Peter A2 (Peppercorn)
LNER Peppercorn Class A2
The London and North Eastern Railway Peppercorn Class A2 is a class of steam locomotive designed for express passenger work by Arthur Peppercorn, the chief designer of the LNER after Edward Thompson...


Tornado

In addition to the preserved engines above, a new build Peppercorn Class A1
LNER Peppercorn Class A1
The London and North Eastern Railway Peppercorn Class A1 is a type of express passenger steam locomotive. Forty-nine original Peppercorn Class A1s were built to the design of Arthur Peppercorn during the early British Railways era, but all were scrapped with the discontinuation of steam,...

, 60163 Tornado
LNER Peppercorn Class A1 60163 Tornado
60163 Tornado is a main-line steam locomotive built in Darlington, England. Completed in 2008, Tornado was the first such locomotive built in the United Kingdom since Evening Star, the last steam locomotive built by British Railways, in 1960...

was completed in 2008.
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