The first driver training run for the 319 units took place on Wednesday, when 319363 was seen leaving Allerton depot under its own power at about 12:15, and then heading south towards Crewe. I arrived at South Parkway about a minute too late to take a picture.
The second out and back trip didn't run.
On Thursday the same unit did the same run, here's a picture of it at Crewe kindly supplied by a correspondent.
No sign of any runs today, so far.