By J Chappell

Great Western prairie tank locomotives could be found across the network hauling goods and mainly passengers on branch and suburban lines. The 4575 class were the smallest of this type of loco, Collet’s development of Churchward's 4500 Class with larger side tanks and increased water capacity. Some 100 were built numbered 4575–4599 and 5500–5574. A number were fitted with auto apparatus in 1953 to enable them to run push-pull trains on South Wales lines.

No less than 11 have survived into preservation, one of which went to Poland and Hungary and spent time working with the Orient Express. On return to the UK it was painted in London Transport livery for the 250th anniversary of the Metropolitan line.

This model, nearing conclusion, was shown at the 2019 National Model Engineering and Modelling Exhibition at Doncaster.

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