[tomaw]

OK, I have narrowed this problem down to the local transparent proxy that I'm using here, as forcing another one solves to problem. Guess I'll leave it as it is now and turn off the proxy setting in a few days and see if the problem persists.

I did try calling technical support, but was met with a very unhelpful gentlemen who simply told me that my cable modem's MAC doesn't exist on the NTL network and I must be reading it incorrectly.

If anyone here can generate a service request for the relevant transparent proxy it would be appreciated, PM me if you require more infromation.

Cheers,
Tom