Cornwall best tyre and alignment

[GolfAcevanman]

Hi. Getting excessive tyre wear on near side front tyre on outside wall. 255/40 r20 xl. I’ve read a recent thread about camber, tracking and bush wear. Tyres are at 42 psi all round. Don’t carry much weight as it’s a converted camper. Lwb DSG .
Guess I was wondering if anyone could recommend someone down in deepest Cornwall not far from Saint Ives that could check all of the above. Halfords are ok but can be a bit basic.