Possibly one of the bushes in the upper arm is f**ked on that side, but bob Jane should have told you if there was any movement because of that, if it were the case though
It's hard because those stock upper arms are a fixed thing, there is no adjustment in them so it should be the same either side
So it can really only be a f**ked bush or a bent upper arm
Or a bent lower control arm could also affect camber, suspension is such a flamin mongrel - last issue I had felt like a bent tie rod it turned out to be tyre wear...