Whatever you do don't get your rackets strung here. I asked for a specific tension on my racket which I have used for a while, and know the tension well. Asked for it at that tension, charged me 22 pounds (expensive considering), and it came back looser than any racket I have ever used. I question the stringer of the shop and his/her qualifications as I have never seen a stringer get it this wrong before.
They have done lazy jobs with family members as well, with end nots being rushed, again tension being so low you could play lacrosse with it.
Don't waste your time here.
Surrey Sports sells a range of sports equipment including cricket bats and squash rackets.