My focus is veering to the left

[Action Rab]

First Post on here and never owned a Ford till now. Got myself a mk2 09 plate 1.6 zetec and so far I like it. Not much wrong with the car for its age and mileage but I've noticed its veering to the left. I took it to a garage to get my tracking and alignment done along with a wheel balance and it showed that the caster angle of the 2 front wheels was different and not something that can be adjusted on that particular model of focus. My question is, would this cause my car to veer to one side and would the cause be a possible shunt the cars had that hasn't been declared?

[Milkman]

Not sure but it could possibly be that one of the wishbones could be bent.