Thanks for the advice, I went back to the garage this morning and got them to swap the tyres front to back (tyres are directional). Drove off and found the car was pulling to the right this time. Went back and asked them to re-check the alignment but they refused as the boss said I needed my shocks replacing. However one of the guys said lets swap the tyres on the right hand side front to back.
I drove along a stretch of the A4 several times and found that the car was pretty much straight, need to go onto the motorway to confirm. The only problem I have now is that the pairs no longer match but at least it’s better than it was.