Windows XP Service Pack 1/1a CD ordering (UK)

Can anyone tell me where i can find the site to order this for UK........i can only seem to find US Microsoft order site, and the search engine on the UK Microsoft site keeps taking me back to the US site. and i cant order from there as i live in UK.

Cheers.

I found this list of UK resellers on Microsoft's UK website.

Hmmm still can't find the site to order the sp1 CD for UK people.