Servicing has fixed prices: Basic £120, Interim £199, and Major £299. Add an MOT to any service for £45. Jobs that vary by vehicle, such as clutches, belts and brakes, get a written, itemised quote before any work starts, and that quote is what you pay.
There is no call-out fee, and no "while we're in there" extras added without asking you first. If you are not sure what the fault is, start with diagnostics from £45 or just describe the symptoms over the phone. Elliot and Keith will often tell you for free whether it is worth a visit at all.
Regular customers can spread the cost with the Service Plan from £20 a month, which bundles annual servicing with priority booking and member discounts.