Servicing

Anybody who lives in Surrey, UK who can help me out? We have a Legacy which is coming up for an MOT and needs some other work (minor oil leak, rattling noise at back) sorted fairly soon. Porblem is, the Subaru approved dealers in Surrey are trying to charge an arm and a leg. Does anyone know of a decent servicing company/garage they could recommend in South East Englnd? Much appreciate any help!