Just to update, last week my (22 year old) 996 flew through its MOT with no advisories. I did have have a fair amount of work on the car done by JAZ last year when I bought it, including a major service, but investing money into the car early has given me a wonderful (if somewhat curtailed) first year of ownership.
I've done about 1,500 miles in the year (including a track day), so I asked JAZ whether I needed to have a minor service with the MOT. Due to the limited mileage, they suggested I consider an inspection rather than a service, which I was happy to go with as it gives me peace of mind. The inspection, MOT and re-gas of the Air Con left me with enough money for a decent cup of coffee out of £200, so I'm a happy bunny.
Happy to recommend JAZ for their expertise, pricing and great customer service. I've been really impressed with them and the car is running beautifully.