Hrothgar wrote: By the way, we have a Garmin (satnav) for Australia. Does anybody know if we can have UK maps loaded onto it?

I've loaded US maps on my oldish European Garmin Nuvi. Depends on the type/memory/SD-card-ness/ etc. If you can connect it to Garmin Express via USB it'll tell you and you may be able to download it. Not cheap; a bit cheaper on eBay but you have to know what to buy.

Worth getting IMO to know what speed limit applies. These change every 100yds these days.