Worryingly Crufts appears not to have its own petrol station. Should we be worried about this?
My point was that many people travel quite long distances (at motorway speeds, where EVs typically have significantly reduced range) to the NEC, so recharging there while you are at the event you're attending would seem the obvious thing to do. Rather than having to stop and wait somewhere else before or after.
Not an issue with IC vehicles where (a) you have much more motorway range to start with and (b) refilling takes a maximum of 5 minutes if required.