A quick update on Back2you. It's about the time my subscription was due to renew but I hadn't received an invoice from them. On contacting them, they sent a new tracker out to me because, they said, the old one would be getting unreliable now. It arrived yesterday and I've just popped out and fitted it. Even easier than before, as there are only two wires, so I've just given it a permanent live and an earth. It's already showing up on their map, which seems to be based on Google aerial photos now. Very prompt and pleasant service too - they actually seemed to remember who I was!