Unfortunately after reading the last few posts, I am about to fly in the face of the advice and do exactly that, swapping my worn fronts to the rear and having 2 new tyres on the front, although I am an experienced driver and won't have problems coping with oversteer, as I am aware of that potential 'risk'.
My post is really to give everyone an update on my situation re the unevenly worn fronts....
After originally contacting Alfa Monday 16th, I finally got their 'decision' yesterday which, ignoring the length of time it took, I feel is quite fair and have agreed to.
While they said their technicians insist that a 7k life for the tyres is perfectly within expected limits due to the weight of the diesel and being a performance car, they agree that it is a reasonable argument for premature tyre wear, specifically because it's uneven tyre wear.
They have offered to replace one of the 2 tyres at their cost and do a 4 wheel alignment - essentially half pricing them - and I've accepted this on the understanding that this is an immediate solution for these fronts, but it doesn't necessarily solve the problem - so we will be having the tyres monitored by the Dealer (Autoworld, Chesterfield) every 750 - 1000 miles or so to check the wear, and if it starts to happen again, they will try something else and the new tyres would again need sorting at their cost or at least a vast reduction, to which they agreed, not least because "it would help us to gather important data regarding the tyre wear over a period of time" enabling them to more likely come up with a reason/solution for what they've accepted is arguably a potential issue.
So, 2 new Conti's going on the front, paying for 1, and the old fronts going on the rear as they still have a lot of life over the majority of the tyre, of course, apart from the inside which is still legal and may provide 2 or 3k yet, especially now they will wear evenly being on the rears.
All in all, I'm happy with that, well done to Alfa and Autoworld, now to see if the 4 wheel alignment does anything and see how it all goes over the next 6 months or so.
Will keep you (and Alfa) informed.