Many aspects have been covered, but as one who worked at Carr Loco Doncaster for some years I would like to make a few additions: 1) The railways at Doncaster were the Great Northern of which Doncaster was the Headquarters, and subsequently part of the LNER, the next in local importance was the Midland railway, followed by the Great Central and a number of small local lines serving local collieries. 2) The excellent CDs of the Plant Works cover staff employed by the main works at Doncaster, and do not cover operating grade staff like signalmen and traincrew etc.3) Carr is a Norse word for fen, and water from the higher ground now Balby Road, and Green Dyke Lane would run down into the lower ground, leaving it often flooded and certainly boggy for most of the year.4) There was a signalbox known as Carr Box, guess where it was situated.