Accurascale have announced J67/J68/J69 in various versions, a cute little engine for the London area (though they operated elsewhere as well) £139.99 DCC ready. Just the job for many mixed BR/LT layouts.
Now there will be a need for the correct passenger coaches so as to emulate the Epping Ongar shuttle.
I wonder if these ran on the East London line?
They did indeed operate on the East London Line, frequently on freight trains but a few times on enthusiasts specials in the 50's. There is a photograph of one such special, double headed with Gresley stock in 'blood and custard' livery. As an aside the Metropolitan E class # 1, as being introduced by Rapido also ventured on to the East London Line on occasion, also on specials. It is possible that both locomotives were on the ELR at the same time but no photographs are known to exist but then you can also apply rule one.
There was a rail tour on the East London Line with an E class L44 and Steam stock in the early 60s. I don’t believe the E class tanks ran in passenger service normally. The steam service ceased in 1906 and I think the Metropolitan service restarted with electric stock in 1913. I think the E class tended to be used on the extension line as it would have been the latest passenger loco of the time. I guess we will never know unless there are photos of the period. My guess is that the A class tanks were used.