I usually buy tyres from mytyres.co.uk then have a local garage fit them cash in hand which is nice and cheap
We bought a set of veredestien quatracs which are incredible in the wet/snow and dry for the wife's corsa to replace the firestones which were shit in all conditions!
Ive got continental sport contact 1's on the back of the focus with uniroyal rainsports at the front, the uniroyals are excellent but a little noisy on hard cornering.
The fox has Goodyear eagle f1 assymetrics on the front which tuen in very well and nitto 555s on the back which seem to cope ok
Thera web has the smar goodyears as the fox but on the back and pirellis on the front, sticks like shit to a blanket
But, in answer to your actual question, mytyres.co.uk