"Steven Campbell" gurgled happily, sounding much like
they were saying:

I also came up with a few sites suggesting that Alloys are especially
prone to sticking as they sort of weld themselves to the wheel hub with
the heat generated!!!

It's simply some electrolytic corrosion between the aluminium alloy and
steel. A smear of copaslip round the hub will sort it for next time.

And for the removal - yep, loosen the nuts slightly, and drive a short
distance.