someone help me with my ford focus

I have a ford focus rs and the tyres are completely bald. can someone please tell me where I can buy tyres and get them fitted due to I am looking for a new place to buy my tyres from, I work various hours so if I have to get them fitted it would have to be at a convenient time for me. if anyone could recommend any sites they buy tyres from that would be great.

Hey everyone don't worry, I have browsed the web and found this site and got them from there just because they are cheap, simple to use and go the extra mile to make sure the job is done plus they also fitted for me . I recommend them to everyone.
http://www.tyres247.co.uk