I'm now aware, thanks to @JN114 and my own notes, that of these 10 vehicles:
5998, 6024, 6067, 6158 and 9507 are in BR blue/grey livery
6042 and 9520 are in Anglia livery
Can anyone tell me what liveries 5961, 6054 and 9526 are in...?
If so, thanks :)