JGC Porsche — Brackley
Unit 8b Boundary Road, Buckingham Road Industrial Estate, NN13 7ES
Ten minutes from Silverstone · Appointment only
Get directions →JGC exists because James got tired of being told how long a job was allowed to take. Fourteen years later the business has grown carefully and deliberately: more equipment, more capability, the same person under your car.
Ursula Gunn-Carter runs the business alongside him — the side of a workshop owners rarely see, and the reason the rest of it holds together.
JGC opens with James working alone, mostly on 996 and 986 cars for owners who had been quoted main-dealer money for a coolant tank.
The first PIWIS subscription, which changes what the workshop can take on. Word starts travelling round the Silverstone and Bicester crowd.
Room for four cars inside, a proper parts store and an office. Ursula joins full time and the diary stops living in a notebook.
Bought as a development car. Everything we recommend for track use has since been run on it first.
The current factory system, plus four-wheel alignment and corner-weight scales, so setup work no longer goes out to a third party.
Every customer’s records — work history, photographs and invoices — given a proper interface, plus a membership that puts owners on WhatsApp with James.
Owner and technician
Automotive engineering degree, factory and specialist training, twenty-four years of water-cooled Porsche. Does the diagnosis, does the work, signs the sheet. If you have spoken to someone about your car here, it was almost certainly him.
Operations
Runs JGC alongside James, from the diary and parts supply to how the week is scheduled. She decides what the workshop can realistically take on — which is why we are appointment-only, and why your car goes on a ramp the day it arrives.
Nothing here is for show. The alignment rig and the corner-weight scales exist because you cannot set a car up properly without them, and the PIWIS subscription is renewed because a Porsche without it is guesswork.
Independent means we can spend an hour proving a fault instead of forty minutes guessing at one, and tell you to keep a part that still has life in it.
Tell us the model and roughly what is on your mind. We will come back with a date, a price and how long we will need the car.
If you need a hire car after dropping your vehicle off, we have partnered with Enterprise — just ask when you book in and we will arrange it for you.