Thomas William Harrison was killed in a big German air attack behind the lines in October 1917 during the Third Battle of Ypres (Passchendaele). He was born at Great Casterton, the son of John and Elizabeth Harrison, and lived there with his wife and child before the First World War. He worked as a coal carter before joining the Royal Garrison Artillery and serving with the 155th Heavy Battery. He was killed on 14 October 1917, near Bleuet Farm, north west of Ypres. A fellow soldier described how they were moving with a number of horses to a gun battery position. When they had got about two thirds of the way they were attacked by about seventeen German aeroplanes with bombs. One bomb wounded Gunner Harrison so severely that he died in about half an hour. Three other drivers were wounded and only two escaped. Thomas is buried at Bleuet Farm Cemetery, grave II.A.7, and is remembered on the war memorial at Great Casterton and on a plaque inside Little Casterton church which was originally put up in Toll Bar Methodist Chapel.