For Stagecoach depots, the PVRs are listed in the fleetlist. Here's Sunderland's:
3 - 8x Gasbus
4 - 3x Dennis E200 + 6x E300 (Gas or Diesel)
8 - 2x Dennis E200
10/11 - 10x E200 (Dennis or MAN)
12/13 - 9x Gasbus
16 - 8x Gasbus + 1x E400*
18 - 1x MAN E200 + 1x E400*
20 - 5x Gasbus
23 - 7x E200 (Dennis or MAN)
X24 - 3x Gasbus
99 - 1x E400* (Dennis E200 on Saturdays)
Ecos - 10x Dennis E300
Durham Scholars - 2x E400

*E400 comes from scholars duties.