as we’re in S&C fantasy land, the obvious solution is to wire from Appleby to Garsdale, centred on the 33kV DNO feed at Kirkby Stephen, giving a 20 mile / 25 minute recharge opportunity, and 2 x 30ish mile / 40 ish minute stretches off the wire. Well within the capability of existign battery units.
Although I do agree with @HSTEd that the most effective solution would be a big battery, combined with a long layover at Carlisle. 1MWh would do it for a 2 car unit, about 10 tonnes worth of LiTo battery pack.
Although I do agree with @HSTEd that the most effective solution would be a big battery, combined with a long layover at Carlisle. 1MWh would do it for a 2 car unit, about 10 tonnes worth of LiTo battery pack.