Thomas6187 meant 0856 Piccadilly arrival (ex-Stoke).
According to RTT, from 11/7 the above unit now goes back to Longsight (instead of stabling on Picc platform 12) as the lead unit of 5H11, 0900 ECS ex-Picc. The rear unit is off the 0715 ex-Macc (arr Picc 0756) - this unit previously alone formed 5H11.
There is now a second afternoon ECS working from Longsight to Picc to provide the unit for the 1723 Picc-Hazel Grove - 5H02 at 1534. The first, as previously, forms 1631 Picc-Picc via Glossop & Hadfield.
Why aren't the two units sent from Longsight combined? I imagine it's because it's desired to send them to Picc in good time, but having a double 323 stabled would effectively put a platform out of use, but one 323 in each of two platforms can be tolerated.
On Wednesday 27/7 the unit off 5H02 then apparently formed the 1646 Picc-Crewe, and the unit ex-Crewe arr 1640 dropped back to do the 1723 Hazel Grove. The ex-Crewe wasn't late in, I imagine it must have needed attention of some sort.