Looks like you'd better check with the dreaded dealer. D..
I am obviously in the wrong job as I cannot afford to change tyres at this sort of frequency. I shall continue to run my flanders in 2WD until the tyre wear evens out and then bolt the propshafts back on. D..
If the back are like new and the front are worn out you are already running on mis-matched tyres so puting a new set on the front might even things up a bit. If your VCU is working it might be OK.
Thanks for the info G13SJC!
Had this question in mind but I did not want to start another thread.
G13SJC your the best!