(02 Apr 2014, 8:23 pm)Kuyoyo wrote X93 has a seasonal PVR difference - PVR 5 on the current (winter) timetable, increasing in the summer (previously PVR 7, rumour is this year will see a PVR of 8 instead).
X21/X22 for the same reason - hence why there's only 6 new E400s on order for the route as part of the 'Sapphire' upgrade with the remaining 8 being made up of refurbished examples (I would guess a further couple will also be treated to give spares).
There are several on order throughout the UK this year with the DB300 no longer being produced.