Cheers Jimbo and Ian,
I've asked a couple of my new neighbours who it is that supplies their connection and they're BT and NTL, through a BT line.
I haven't tried a phone in the socket, as I assumed it would be dead, but I'm going to give that a go as soon as I get in later.
Thank very much for your help guys!

Have a great weekend.
Eric (ericthefish)