1. Check www.crownhill.co.uk (hey, let's support the owners of this forum)
2. www.farnell.co.uk (not the best price, but next day and P&P free)
3. www.microchipdirect.com (they'll be in your hand in 3 days)
4. www.futureelectronics.com (yes, they do have a UK operation)
5. www.rswww.com (if you really want to pay silly prices!!!)