Hello Golfer and welcome,
I suspect you'll get several viewpoints here.
What is the approximate road distance from your new house to the exchange ?
This could be important if you're looking for fast speeds.
As Tiscali is now CarPhone Warehouse you may find there will changes in pricing and services before too long.
There may also be changes in the quality of their help desk which some were not over-enthusiastic about.
I suggest you use
http://www.kitz.co.uk/adsl/adslchecker.phpto discover which LLU providers are available.
Re the BT side of things, if you can arrange a move as opposed to a termination you might get a better deal.
If there is an existing ADSL service it might be possible to save the connection charge if you can pick up the MAC but that could be difficult as you'll almost certainly be allocated a new number.
You might also want to consider Virgin telephone if you are opting for a cable service.
Do also check that the cable service includes a broadband service rather than Virgin's ADSL offering.
E.g. I was informed recently that some parts of Leicester have an analogue cable TV service but not broadband, whereas other areas have the full Monty.
Kind regards,
Waltere