Watching the live signalling today I was pleased to notice that proper overtaking moves have been programmed into the schedules. Each hour the stopper from Wigan to Liverpool via Newton (The line through St Helens Central is closed.) uses the crossover into Huyton platform 2 and then waits while the fast Newcastle to Liverpool train behind it passes through platform 1.
So far it seems to have worked quite well. The schedules have a seven and one half minute stand at Huyton for the stopper, to allow for a bit of late running.
The same was happening last weekend, but I hadn't got the signalling diagram fully working then.
Oddly, despite using the overtaking move, the timetablers are still showing down trains on platform 1 and up trains on platform 2 at Huyton.