Nicholas Lewis
On Moderation
Redhill to Reigate is fed through a feeder hut at Redhill station which used to limit it to 8 car slam door units and i recollect in notch 2 so definitely won't get a 12 car up there irrespective of platform length issues. Not sure it needs a mega expensive upgrade unless you were going to future proof the line for continuing electrification onto Guildford (which makes sense) but nothing comes cheap in NR.Locally Network Rail and GTR keep telling us that there is no power capacity for 8/12 coach trains to Reigate without a very expensive upgrade to the power system.
The Slow lines can take as many trains as the Fast lines. Only two weekends ago when the Fasts were blocked it happily delivered 15 electric trains per hour each way. All the TPH's along this stretch were upgraded to substations a decade ago and the HV 33kV distribution systems was reinforced from Three Bridges Grid so a single 769 per hour would have hardly been noticed.Also, that the slow lines from Redhill to Gatwick have no spare power capacity for extra trains.
One of the advantage of battery trains is when regenerating you have a ready made load in the battery to absorb the energy which reduces the amount of energy that needs to be provided from the traction system. There is plenty of opportunity to do that when the train isn't drawing traction power so the overall maximum power demand of the train wouldn't change. So battery trains will present additional demand on the electrification system but again the NDL 769's wouldn't have broken the system but despite being told decarbonisation is important it clearly isn't that important. Mind you looks like the leasing charges for the 769's weren't going to be cheap if by dropping them they can find most of the DfT savings needed.I suspect it’s just an excuse but it would mean that an upgrade might be needed somewhere to run battery trains. Hope not as I agree that North Downs is perfect for Battery trains otherwise.