The ones I can think of off the top of my head are

Midlands
Derby? - E200MMC - East Midlands Airport car park
North East
Ashington - E400MMC - Sapphire X21/X22
North West
Volvo B5LH for various depots?
Macclesfield - Merc Sprinters - town services (Winsford have also taken 2 of these)
Runcorn - MAN Ecocity - Eco Green
Wrexham - E400City - Sapphire 1
Southern Counties
Gillingham - E200MMC & E400MMC - Sapphire 700
Harlow - E200MMC - Airport 509/510
Yorkshire
Castleford - E400MMC - Sapphire 163/166
Castleford - E400MMC - 189
Heckmondwike - E400MMC - 254/255
Yorkshire Tiger
Idle - E200MMC - Flying Tiger 737/747