Most services post 20/5 seem to be on RTT now. There are one or two ECS workings still to load, and a lot of the platform numbers are suspect, but it's getting clearer what is going to be working what.
Until proved otherwise I'm inclined to suppose that any EMU which starts or finishes its diagram at Allerton will be a 319, and one which starts or finishes its diagram at Longsight will be a 323.
Therefore of the seven units required to cover the Liverpool to Crewe stopper, I reckon 5-6 will be 319s, and only 1-2 323s. (The timetable permits interworking between the stopper and the Liverpool to Blackpool service, but platform numbers indicate that this is not going to happen).
Two 319s will continue to stable at Manchester Victoria Reversing Siding, overnight Mondays to Saturdays, and all day Sundays. Both commence with a stopper from Victoria to Liverpool Lime Street but, separately, then go on to Blackpools or Warringtons. At close of service they come from Liverpool (as a stopper) and from Wilmslow (in service, via the Ordsall Chord). One also stables at Vic between peaks, between doing peak-hour stoppers from/to Liverpool.
EMUs will stable at Blackpool North CMD for the first time, six units I calculate, probably all 319s. Three go on to Blackpool - Airport (the fourth unit provided by Stockport CMD), two will go on Liverpools (the third unit provided by Manchester Victoria), and the sixth unit will cover the Blackpool to Preston shuttles. (DMUs are going to continue to stable at Blackpool CMD too, at least for the time being).
So if I'm completely correct (which is unlikely) the Monday to Saturday turnout of 319s should be something like this.
5-6 Liverpool to Crewe stoppers
4 Blackpool to Manchester Airport
4 Liverpool to Wigan
3 Blackpool to Liverpool
2 Liverpool to Warrington Bank Quay
1 Blackpool to Preston
1 Liverpool to Manchester Victoria (peak only)
Total daily turnout 20-21, which is slightly higher than at present, but there are sufficient units available to cover.