There are several Color Company outlets (formerly known as FedEx Kinko's) and Mail Boxes Etc. locations in London to handle your photocopying, next-day mail, and packaging needs. Check their websites for more locations.
The Color Company. 1 Curzon St., Mayfair, London, W1J 5HD. 0800/939–493; www.color.co.uk.
Mail Boxes Etc. 19–21 Crawford St., Marylebone, London, W1H 1PJ. 020/7224–2666; www.mailboxes-etc.co.uk.