The limit on mobile work is not skill or equipment. It is ramps. Anything that needs the car lifted properly has to happen in a workshop. Everything else can be done on a driveway, in a car park or at the side of the road, and that covers the large majority of what goes wrong with cars.
So we run both. The mobile side means you do not lose a morning for a battery or a warning light. The workshop at Turner Street means a clutch, a cambelt or a DSG gearbox gets done properly, on a ramp, with the right tools, and not on a driveway in the rain.
Whichever it is, the price is the same price. There is no call-out fee for coming to you, and no premium for using the workshop.