The front tires have a pronounced inward tilt which is causing inner tire wear. (yes I should have noticed it earlier but life gets in the way).

My plan it to purchase and have installed all the bushings for the front suspension but might this be caused by something else?

Thanks to all in advance

 

I'll give it a stab.

The car has an inherent negative camber built into it, as it's a sports-touring car. There will be a hint of interior tire wear difference due to this.

Now, with age, the coils start sagging a bit, as well as deterioration and fatiguing upper shock mounts (with bushings). With this additional help, the negative camber becomes even more pronounced. Inner edge wear increases.

Also, if the inner edge is showing any signs of feathering (the tread blocks are uneven) that is indicative of too much toe-out. With the negative camber, and a slight out-of-spec toe-out, will result in this feathering on inner edge. Our cars are very sensitive to a good alignment. Knowledge of our suspension is required to get it correct. Many (including myself) have found this out the hard way. NTB, Firestone, other tire shops are unlikely to get it right. Find a specialist dealing with British cars, or the dealer for this service. Worth the extra $100, I promise.

 

In my case, this wear pattern was caused by a failed front lower control arm bushing.