Latest updates (from what I have collated together):
I have filled in the gaps on some of the liveries by using my last records of the units when they were 319s - not 100% sure of it being correct now but it is closer to the mark than a blank space
Also, the latest news (that I have) is that 769928 has broken cover as a Class 769, moving from Loughborough to Nemesis Rail at Burton (loco hauled) in the last couple of days.
As ever, if you have more up to date info, let me know and I will amend accordingly