Hattons commissioned Heljan to produce the UK class 28, which was a Metropolitan Vickers loco, which was originally manufactured around the same time as, and was related to, the A class. To me at least it looks like a fine model.
http://www.ehattons.com/33376/Heljan_2801_Class_28_Co_Bo_Diesel_D5705_BR_Green_with_Small_Yellow_Panels_as_preserved_/StockDetail.aspx