Thanks for the replies.
I've not considered specialist liveries like Timesaver
), but I think all of the six listed were fairly widely used - I've now added photo links to the opening post as illustration, plus dates as I understand them.
Regarding 'the fleet hasn't been in one consistent livery since 1986', certainly here's
a photo of liveries ref 1, 2 and 3 coexisting, and here's
one of liveries 3 and 6, but there must have been a time in the late nineties when all the fleet was in the blue, red band, silver or grey, blue?
Also, is it correct that by the time the off-white and the Coventry sky blue band were being added (to livery ref 3b), the newer blue, white and red livery (ref 4) had already started being introduced?