Mintona
Established Member
Interestingly (and for the first time in my experience), instead the usual procedure (continuing at a fair speed off the Didcot Avoiding Line, crossing from the relief to the main, continuing to accelerate, and then coasting a bit and switching from diesel to electric power at high speed at Moreton Cutting) the train instead slowed down substantially on the avoiding line, and then switched very snappily from diesel to electric mode at low speed immediately once on the relief line, before accelerating very well through the rest of the junction as it switched from the relief to the main line. It's great to see this sort of flexibility starting to happen. I wonder if it's a deliberate strategy to gain some time through superior acceleration on electric mode, or whether it was opportunistic since the train had been checked on the avoiding line in any case.
I think I can answer this query. IETs are able to change over to electric anywhere provided the speed is under 20mph. Certainly yesterday (I don’t know if it’s still there today) there was a 20mph speed restriction on the points coming off the Didcot Avoider onto the Up Relief line so the train was going considerably slower than the normal 70mph, and the driver decided it was better to raise the pantograph there to accelerate harder away in electric than would’ve been possible in diesel with the usual change then at Moreton.