Hello Philip,
Bridgend eh - very, very close to home for me. Quite rightly, Trevor normally welcomes you to the fold, and although I haven't been on here as long as a year yet, I find the help offered to be very worthwhile.
My line with your brakes would be to ask if you have any reason to think that the brakes are currently not as good as you would like them to be, or if perhaps you enjoy a more enthusiastic style of driving and would welcome some improvement over standard? My experience with the A3 brakes is that in standard form they are better than most comparable cars, but ours is fitted with genuine Audi discs and pads. The reason for this is that at the first change of pads we used some aftermarket ones from our local motor factors. Cheap they were, but we changed back to Audi pads within a couple of months and restored the original confident braking. Chalk and cheese!
Where I'm getting to Philip is whether you know if you have genuine or at least quality brand discs and pads fitted now. If not, then replacing with such may give you the improved braking you want. If indeed you are interested in enhanced performance braking then it could be a different approach and no doubt you will be considering larger discs etc. at not inconsiderable on cost. If you are departing from genuine VAG parts then perhaps worth considering the likes of Brembo or some of the more exotic EBC variants. There are some once well respected brand names that I would avoid, but that is a personal opinion of course.
Perhaps you could give us a bit more on the reason why bits and I'm sure someone will help.
Kind regards,
Gareth.