Well had another shock tonight when I went on the BT site and it said we could get up to 80Mb/20
That must have been quite a shock.
Similar happened to me, for ages I just wasn't in the roll out plans, then it was going to be 2015, then this year, then I in September saw a guy at the cabinet who told me it was available then and he was right!
You may want to think about changing to a new ISP first, and then upgrading to FTTC. That worked well for me, seamless migration from Demon to Zen with zero downtime then, a few weeks later, seamless migration from Zen ADSL to Zen FTTC. If you do sign up for FTTC before switching, make sure you're not agreeing to a year's minimum - some do.
I chose Zen because of their reputation for service as a comfort factor after Demon's unbelievably awful Indian call centres. No regrets, but haven't really had reason to test them either. Others may be as good and/or cheaper, but agree with general sentiments... reputation for service & support should a primary consideration in selecting ISP.
Your old ISP may well offer to extend email access for a monthly fee, Demon did, though I had no use for it.