<< You wont go wrong with Triton Motorsport. they are on Bournemouth airport industrial site (hurn) near Christchurch. They are Impreza specialists, they service etc and also prep rally cars, mechanics are ex rally drivers and mechanics, they know their stuff!! have a look at www. tritonmotorsport.co.uk to get info.
I`ll second that
They do all my servicing,saves me mega bucks compared to main dealer prices