UK men online clothing stores that aren't expensive?

[David Tennant]

Need to get some fresh clothes, strolling the high street just isn't for me (even though you get that personal flavor and can try on clothes) and I can't seem to find a good clothing store for men online.

Ebay isn't bad, but it's not very well laid out and it can be hassle to find something you like.
Customizable T-shirts for cheap is a plus!

Thanks in advance.