I'm trying to find details of my grandfathers postings in the TA during WW1 - he was a driver in the 1st Lowland Field company signing up in Rutherglen on the 4th May 1911. He saw active service in France for two years but where I don't know, and was discharched from the TA 8th May 1916 having done his 5 years.

Any advice on the best place to look???