Hi M2UK,

to CF.
Sit back, kick off your shoes, relax, and enjoy your stay.
I may be wrong (in fact I probably am

) but I think that NTL will disconnect and reconnect for free, probably provided that the new house already has the cabling etc in place.
There are a couple of good guys on here that actually work for NTL and there's bound to be someone that has experience of the same thing so you should get a much better / more accurate answer soon enough.
In the mean time have a poke through the other threads and join in the fun
Raist.