Cheers guys, did manage to find the contact link by my own steam and received a satisfactory reply.
I find it quite funny that people are saying that the high street shops like HMV and Waterstones have an outmoded business plan and that on-line shopping is the way to go, when you're still reliant on Royal Mail who manage to lose 1,000's of items a day. OK Amazon make it easier to order stuff with on-line retailing, and downloading zeros and ones isn't exactly going to result in large overheads and stock inventories but you can't beat complaining to someone face-to-face when something goes wrong ( especially likely with the high value items Amazon are branching into ) and you want to tell them how shoddy you think their service is - doing it over the phone just doesn't really cut the mustard. Plus if Royal Mail do get privatised there's no way that delivery will stay 'free' to the customer.