Thompson's Great Northern 2-8-2
This very rare colour shot of Thompson's first attempt to rebuild Gresley's A1 class locos that had not already been rebuilt to A3.
In the depths of wartime with extraordinarily heavy trains, Thompson decided that the remaining A1's should become Eight coupled express Mikados.
The long wheelbase and problems with the P2's led Thompson to use a Hemholtz truck at the front.
He also cleverly used drive onto the second axle, with the centre cylinder and separate valve gear, as the divided drive that he favoured would not be compatible with the Hemholtz truck.
The mammoth cost of the rebuild and the design difficulties led to the whole design team including Thompson, being admiitted to an asylum at the request of the company's Directors and medical advisors.
Therefore Peppercorn took over and just modified the P2's as shown previously.