Surely to reverse S to N at Rayners Lane would best be done via the trailing crossover just beyond the junction.
Well it might be if there was a signalled south-north move over either trailing crossover, but alas not.
In fact, according to the diagram in @martin12's post, the trailing point in both cases is a spring point. I'm not certain that's still the case, but it certainly was the last time the area was resignalled, so the points would have to be secured for any move over them in any circumstances.
During the closure of the Uxbridge branch over the weekend of 29/30 July the points south of Rayners Lane on the Metropolitan line, 14, were renewed with Surelocks, eradicating the spring-toggles. The same is planned for those on the Piccadilly side during a future closure.
"Over a weekend closure on 29/30 July 2017, Rayners Lane 14 electro pneumatic clamplock points will be converted to electric powered 4ft Surelocks and the existing toe position moved 2.756m south towards West Harrow station. Rayners Lane 14 loose spring toggle points will be converted to electric powered 4ft Surelock points and the existing toe position moved 0.883m north towards Rayners Lane station."
There were no signalling changes, and thus there is still no south to north move.
Last Edit: Aug 23, 2017 21:58:39 GMT by MoreToJack