It is a matter of public record that the BR Pilot Scheme was explicitly, or at least by association, terminated before any meaningful data had been accumulated about the suitability of the types on trial. Indeed some locomotive models were ordered in bulk even before the prototypes/pilots had turned a wheel in anger on BR metals.
So, what if the Pilot Scheme had been allowed to run its course, and the wheat had been separated from the chaff, and the regions had been brought into line for the greater good of the network and the country. Based solely on the merits of the locomotives themselves, what would have been our standard types in the mid 60s? Based on what I've read and surmised, I've come up with the following. I've deliberately assumed that main line electrification didn't happen, on cost grounds (to make it more interesting/less interesting- delete where appropriate) and so the west coast main line was dieselised. I've also assumed that the BTC decreed that Diesel-Electrics will rule across the board: (TOPS Codes used for clarity):
Standard Shunter: Class 08
Standard Type 1: Class 20
Standard Type 2: Class 26/27
Standard Type 3: Class 37 & Class 33 (BR(S) only)
Standard Type 4: Class 44/45/46 - Heavy Freight, Cross Country & Secondary Passenger Locomotive
Standard Type 5: Class 55 - ECML, WCML, GWML Express Locomotive
Edited by scottystitch, 12 February 2018 - 17:19 .