Presenting the British Railway's D16/2! These Bullied designed diesel locomotives were origannly ordered by the Southern Railway, but the wouldn't enter service until after nationalization.
The first two, 10 101 and 10 102, were built at BR Ashford Works in 1950 using 1750 bhp engines and transmisions from English Electric.
The Third, 10 103, would be built at Brighton Works in 1954 with an improved 2000 bhp engine, and would serve as the bassis for the BR Class 40. In my AU a further three the three, 10 104 through 10 106, were built to the design of 10 103 for trialing diesel traction on the Chester and Holyhead Railway.
The original three would be sold the DWR following their withdrawl in 1963, taking over the DWR's express run to London.
The C&HR trio would remain in service with the C&HR, taking over the railway's expresses past Chester when the Mainline Steam Ban came into effect.