Went up there a few years ago with a mate who was looking for some off road tyres for his Vitara.
They where reasonably pleasant but made it very clear they where only interested in working on Landrovers and wouldn't even bother giving him prices for the tyres he was after as it was a simple case of "we only stock landrover sizes mate and don't want to order anything else" or words to that effect so we left and havnt been back since.
Looking at their web site it looks like they are now advertising that they will work on other 4x4's so perhaps the current economic climate has made them less choosy in what work they take on
Depending on where your based there used to be a decent independent garage on the Silver Wing Industrial estate just off of Stafford Road between Wallington & Croydon. If you give people a rough idea of where your based they may be able to offer some recommendation of local firms for you
What ever you do they PLEASE DONT EVER be tempted to use Wilsons in Epsom as like 1000's of their other customers you may find yourself seriously worse off financial and even more upset by their poor customer service and general lack of care & attention to your vehicle
