Best of luck for the move, you will have a great time. It'll still be pretty hot at the end of january.
Me and the wife were down in London on tuesday sorting out our passports, we're off to Adelaide in just over a week for 4 months, to escape the winter. Been around 4 years since i was there last so really looking forward to it.
The cars are great, and with all the dry weather there are lots of classics out there, especially american and japanese, euro stuff is a bit more expensive. Holden and ford are everywhere, almost everything is RWD, and usually a minimum of a v6/straight 6. Every single road junction will have many black snaking lines from it.
You cant buy beer in the supermarket or garage (servo), the have drive throughs for it so you dont even need to get out of your car, they will put the chilled carton straight into your boot. Good times