New to RPGs

[Keith Robinson]

There's a comic book store that carries some DnD packs. Think I should try there?

You could certainly go and ask. If they don't have a board, you should ask if there are any role playing games shops in the area. Again, you could go ask on ukroleplayers for shops in cardiff that sell role playing games, which may or may not dig up some useful info.

I already have the handbook and the DM guide for 4th edition, so I'll be fine.

Yes, you did mention it in your first post. It's not that I didn't read that, it's just that my memory failed me at the last second