How long are Tesco delivery H.G.V's?

[twokcc]

Tesco have applied to convert part of a pub near me to Tesco Express. 2 entrances to site which could be used by customers for Tesco or the pub but with raised kerbs between them so that you had to exit by same entrance that you came in on. Tesco deliveries were shown as being by rigid 10.35 metre vehicles only,which had to reverse to make deliveries(as well as customer cars having to be moved). After submission of objections Tesco have submitted a revised transport proposal which shows deliveries by 8.4metre rigid vehicles and 12.6metre articulated vehicles but with raised kerb's between car parks removed so hgv's can enter from one road and exit onto another. So no need to reverse or remove customer's cars (if swept path shown is correct) but delivery vehicle now park directly outside entrance to store.
Are these lengths typical for Tesco delivery vehicles- a quick google search would seem to indicate that they are less than the maximum lengths allowed for these types of vehicles on UK roads?
Any help appreciated, thanks

[twokcc]

Thanks for input, made me think that application should be based on largest vehicle that could deliver to site. They have reduced the rigid vehicle length from first to second application, only reason I can think of is because this shorter length will have a tighter turning circle so no need to reverse once in carpark.