A heads up for anyone contemplating replacing their diff and transfer box oils anytime soon.
Had mine done yesterday, caught a sample of each of the oils and the rear diff and transfer box look ok, good colour and no glitter. The front diff however, was best described as foul smelling and had the look of a chocolate milk shake in appearance and consistency. No glitter and not much on the magnetic plug but with the state of the oil it seems I've done a timely replacement. Car only done 69000 miles!!!!

All good but on the downside, found evidence of two leaks whilst under the car.
Wet but not yet dripping around the rear of the gearbox sump so likely a leaking plug sleeve in need of repair soon, and a wet front arc bar too, though not pouring out and the reservoir level not dropping alarmingly, its only a matter of time

These damn cars, its never ending