The problem can be caused by the camber, the toe-in or the alignment but usually they are all hanging together so if you adjust the camber the alignment has to be checked as well. The toe-in is adjusted with the tie-rod ends. If a suitably qualified person can do this at kwik-fit I don't know! I would go to a proper garage where you know they will not say "ooh yes we have to change this and that and that and that".
From what I've heard this phenomenon can occur in towns which have loads of roundabouts, and I would also double check you're tyre pressures because if low, when cornering and due to the camber of the road it could cause this.