Just got back from Stormfront in Plymouth.
What a load of pains in the rear they are.
They told me that I couldn't have HE discount as it was a "website only" thing, and that i'd have to order it direct from Apple.
It's going to take 3 working days for the extra to clear from my savings into my bank account, so i've got time to figure out exactly what I want, but it looks like being the base Macbook (£818).
I'm going to nip into the Exeter one on the way home today and ask them if they do HE discount. If they do, they'll be getting my custom.