Best Litecoin to British Pound Exchange Service?

Right I'm thinking on investing in Litecoin, I have an old rig at home so all I need is a good gpu (280x) and then i can get mining. I have seen some people say it is not worth it because power costs but seeming as I live at home and have free electricity off my parents thats not really a problem. So I wanted to know that if I were to start mining what would be the best Litecoin To British Pound exchange? Would I be able to get them to post a check to my house or is it better for them to put it straight onto a debit card?

 

Answers would be greatly appreciated!

 

Thanks!