The Peckett OQ was a series of three 0-6-0

0-6-0

Under the Whyte notation for the classification of steam locomotives, 0-6-0 represents the wheel arrangement of no leading wheels, six powered and coupled driving wheels on three axles, and no trailing wheels...

 saddle tank steam railway locomotives built by Peckett and Sons

Peckett and Sons

Peckett and Sons was a locomotive manufacturer at the Atlas Works in St. George, Bristol, England.-Fox, Walker and Company:The company began trading in 1864 at the Atlas Engine Works, St. George, Bristol, as Fox, Walker and Company, building four and six-coupled saddle tank engines for industrial use...

 of Bristol

Bristol

Bristol is a city, unitary authority area and ceremonial county in South West England, with an estimated population of 433,100 for the unitary authority in 2009, and a surrounding Larger Urban Zone with an estimated 1,070,000 residents in 2007...

, between 1951 and 1954 for Mardy

Mardy Colliery

Mardy Colliery was a coal mine located in the South Wales village of Maerdy , in the Rhondda Valley, located in the county borough of Rhondda Cynon Taf, and within the historic county boundaries of Glamorgan, Wales...

 and Tower

Tower Colliery

Tower Colliery is the oldest continuously working deep-coal mine in the United Kingdom, and possibly the world, and the last mine of its kind to remain in the South Wales Valleys...

 collieries in South Wales

South Wales

South Wales is an area of Wales bordered by England and the Bristol Channel to the east and south, and Mid Wales and West Wales to the north and west. The most densely populated region in the south-west of the United Kingdom, it is home to around 2.1 million people and includes the capital city of...

. With large scale dimensions for a tank engine, the nominal tractive effort was 29527 lbf (131.34 kN) at 85% efficiency, making it the most powerful industrial locomotive in the United Kingdom

United Kingdom

The United Kingdom of Great Britain and Northern IrelandIn the United Kingdom and Dependencies, other languages have been officially recognised as legitimate autochthonous languages under the European Charter for Regional or Minority Languages...

, with power equivalent to a LMS Class 7F 0-8-0

LMS Class 7F 0-8-0

The London, Midland and Scottish Railway Fowler Class 7F steam locomotive was an update of the London and North Western Railway G2 Class 0-8-0...

.

No.2124

Oushopped in June 1951 for Tower Colliery, she proved problematic throughout her working life, often refusing to steam.

No.2150 "Mardy Monster"

Oushopped in June 1954 for Mardy Colliery, she worked with sister loco 2151. Withdrawn in 1976, it was moved to the Swanage Railway

Swanage Railway

The Swanage Railway is a long heritage railway in the Purbeck district of Dorset, England. The railway follows the route of the Purbeck branch line between Norden railway station, Corfe Castle railway station, Harman's Cross railway station, Herston Halt railway station and Swanage...

 in 1979, but never used there. She was sold in the early 1990s and moved to the Elsecar Heritage Railway, where she was fully restored. Following a loan to the Weardale Railway

Weardale Railway

The Weardale Railway is a British single-track branch line railway providing regular daily passenger service between Bishop Auckland , Wolsingham, Frosterley and Stanhope. Services began on 23 May 2010 after a lapse of almost sixty years. The railway originally ran from Bishop Auckland to...

, she returned to the Elsecar for firebox repairs, renetering service in 2005. Briefly moving to the East Lancashire Railway

East Lancashire Railway

The East Lancashire Railway is a heritage railway in Lancashire and Greater Manchester, England.-Overview:After formal closure by British Rail in 1982, the line was reopened on 25 July 1987. The initial service operated between Bury and Ramsbottom, via Summerseat. In 1991 the service was extended...

 in 2010, she proved unsuitable for their 25mph running, and was hence hired to the Lincolnshire Wolds Railway

Lincolnshire Wolds Railway

The Lincolnshire Wolds Railway is a heritage railway based at Ludborough station, near Grimsby in Lincolnshire, England and the only standard gauge steam railway in Lincolnshire open to the public. The line is part of the original Great Northern Railway , a rail system that opened in 1848 and once...

 until the end of October 2010.