I had my A2 aligned at Awesome GTI when the FSD's were fitted, they were very good and it cost about £100. It was the first time the steering wheel had been straight and the car didn't drift slightly to the left! Even though the Audi dealer had apparently done an alignment when they fitted a new suspension part under warranty!
I can also highly recommend Drury Lane Services in Oldham. Paul (who runs this garage) has the same kit as WiM (Wheels in Motion) and the set-up he did on my Mx-5 is 2nd to none and transformed the car from a skitish ice skate to a proper handling sports car. The cost was around £120 for the 3 hours works (the MX-5 has more adjustments as the castor, camber, and toe-in can be adjusted on all 4 wheels) Can't recomend them both enough.
Worth doing, especially if the car drifts, or has uneven tyre wear.
David