Hi,
another thing to look for, based on my recent experience, is the front wishbone captive mounts.
They are welded into the chassis legs and the chassis leg can crack, dislodging the captive bolt and mis-aligning the entire front suspension.
My front tyres were worn on the inner edges, a fact that was noted as an advisory in the MOT, but the cracked chassis leg was not.
Solutions vary between removing the engine, or dropping the subframe to access the bolt head with a welder, but given the proximity of the turbo, I'd suggest the engine out route the best.
Prices I've been quoted are similar at £1500.
It is usually the NSF chassis leg that cracks due to the NS suspension having a harder time of things with pot-holes and drains etc.
An inspection may or may not have unearthed, this depending who did it.
My car was serviced for 4 years at the same place, and serviced and MOT tested there prior to my purchase and this problem wasn't noticed. These people are also the ones I would have asked to perform an inspection.
The problem is, it is very hard to see the problem without being under the car and knowing where to look, other than the front tyres being worn on the inside.
Antony