More updates since last time are:

Additions to the fleet are
Scania Irizar YS03ZKZ (now D20CTT), YN06NYR (now C10HLN), YN07LDA (now WSV497) and two new Volvo's

BO55CTT Volvo B11R

Coopers Tourmaster Plaxton Panther BO55CTT in St Andrews 22/6/17 by Andy, on Flickr

BU55CTT Volvo B8R

Coopers Tourmaster Bedlington BU55CTT. by EYBusman, on Flickr

Left the fleet - presumably sold or traded in were 
Scania Irizar H10CTT - re-registered YT60YYP
Volvo B12B WSV497 - re-registered ???

Other bits and pieces include various re-registrations
JJI4889 - E34MCE
YT11LRA - Y29LRA

YY14NLJ - B11CTT
SD15UWJ - GSV403