LOL Dan. - No, the phone goes bezzerk and doesn't ring like 'normal' lol so I know it's no one there, and no it's not bt testing the line, this was happening before I contacted them
I'm starting to think that my Broadband connection drops are seperate from the phone line issue. Yesterday I decided to install the I.E 7 Beta 2 as I've found it to be reliable so far on the test box. I had the 'anti-phishing' setting enabled initially, as a test with this disabled my connection problem 'seemed' to clear up (was up for over an hour last night) but I'll need to do some more testing tonight.
Got my firewall logging too, nothing out of the ordinary from what I can see, a couple of drops but nothing much!
Will see how it goes.