Cheers for your reply's as very helpful.
I'll make sure the engineer installs the VM socket next to the BT master as i want to re-terminate my BT extensions into the VM socket or maybe if i supply enough tea and biscuits the VM engineer will do it for me
Hopefully my number porting will be as straight forward as yours frogstamper and all will be up and running when engineer leaves.
If i have to set up my free wireless router is this straight forward and pre configured like the BT home hub etc just plug in and pretty much connect cables etc and you are up and running?
Thanks all for your help and i'll post again once my install is done to let you all know how it went.