If you do decide to sit on the fence, I'd strongly recommend you send one of these if you haven't done it already;
http://www.dephormation.org.uk/dpa_notices/
It should help if you later discover BT/Virgin have been up to something naughty.
In my view, the safest best is moving ISP now, particularly if you're on BT (both because they've trialled in the past without telling you, and because they say they will only give you 24 hrs notice... yet it takes 5 days to get a MAC code).
Given Gavin Patterson's statements at the AGM, if you are on BT and fence sitting, call BT now and ask for a MAC code so that you can move if you need to (don't take any rubbish about the system being 'down', its always 'down', and you are entitled to receive your MAC code in 5 days).
Also, while I'm plugging my letter wizards, use one of these to get talking with your MP;
http://www.dephormation.org.uk/letters/