Small list of more commonly used UK computer stores. http://www.aria.co.uk/
Looks like a pretty comprehensive list to me Paul. Can’t add any that I’ve used in the past that aren’t there.
Just added the people who do our external IT at work http://shop.midlandcomputers.com/ been good to us.
There will prob be a few more to add as and when I can remember them off the top of my head lol may split into shops and dedicated places for like water cooling / custom modding items as have some to add but there not full blown computer shops.