Well I was on 50/5 and phoned up today to complain and see if I could get free doublespeed to 100 today as the website now tells me I'm due the upgrade in July 2013.
I spoke to a
Gaurav Sharma who at first said it would not be possible without additional cost. Here's how it panned out:
Part 1: He said since I have only a BB line and no other service that I'd have to add a phone line whether I use it or not which would give me 100Mb+Phone @ £41 a month because my 50Mb line now already has a £10 discount applied since on its own it is a £47.25 a month service. To do the £41 a month option would require an installation charge of £49, I said no to this at which point he said he could half the installation cost...
Alternatively I could just upgrade to 100Mb for £47.25 a month...
Part 2: I stressed that this was not correct because I am already in a 100Mb enabled area so the upgrade should not cost me anything given that the upgrade will be free anyway. He said that this is only what the computer allows so I said that BT are offering up to 76Mb in my area right now and that I'd be making calls next week.
Part 3: He put me on hold and came back saying that the system is now showing a few options, he'd somehow managed to wrangle the system and allow me to keep the £10 discount and upgrade me to 100Mb with no requirement for a phone line.
I said yes to this at which point the line cut dead...my landline is on a Vonage service hence the cut out

I quickly checked the superhub and it had rebooted, logged into it and noticed the 100Mb connection status. Seems he'd done it!
I then got acall on my mobile, it was
Gaurav Sharma! I've never known VM to phone back before especially from overseas call centres...anyway, I asked him to confirm everything was set. Apparently during peak ours the upload will be 5Mb but during off peak it goes to 10Mb. the download remains 100Mb unless I hit the fair use limit which isn't an issue.
The superhub rebooted again though and I guess it had pulled down the R36 firmware as the logon screen has a slightly swankier UI. Edit* It has been upped to R36, connection status link is in top right now
Pleased with that! Will check the 10Mb upload later tonight.