I have had my car back after a geometry check by the dealer and they claim to have found nothing wrong with the suspension.
As expected and recommended by a friend they have altered the tracking to toe-in to the minimum setting (wearing on the inside is indicative of too much toe-out).
I have not had a chance to talk to the technician but as soon as I do I will get the settings and post them.
In my opinion something must have been wrong - oh it goes a lot faster now
(not wasting all that energy scrubbing the tyres)