My recommendation would be Talk Talk Business as you are looking at VDSL offerings. I pay £31.49 all in for the first 12 months and I get 80/20 speeds on the Business wholesale network. Line rental with unlimited calls to landlines and mobiles. I can use an app on my phone (and up to 4 others) and make those calls anywhere. 7 day support and I called them yesterday just to see what they were like, I'm impressed.
It's £46 a month after that (2 year contact) but they will not only let you move twice in those 2 years for free they will also install a new line for free. They do charge £50 for FTTC activation but in my view it's worth it.
After all a line is £120 with them, not sure about with BT. Might be free if you take their service. I have infinity also and apart from congestion which they sorted it works fine.
They also do 12 months free ADSL with £16,95 line rental. Again they will install a line for free if needed.
Worth a note that AAISP also use Talk Talk Business network - so you get the same connection without the 1TB cap and for half the price. Maybe the extra £30 is good for customer support reasons? Never used AAISP support but Talk Talk Support is decent and UK based.
https://www.talktalkbusiness.co.uk/
Edited by deleted (Tue 04-Oct-16 10:12:28)