ChrisK, I’ve met even heard of an aircon service. What does it entail?
Basically they just re-gas the system and clean the matrix to get it smelling nice again if you have that damp laundry smell in your car.
If your a smoker and smoke in the car your more likely to smell the effects of a dirty matrix.
I’m not sure if they do anything else to the system so its a re-gassing and an anti bacterial clean and I’ve seen local garages doing it for £50.