Many thanks for the replies, yesterday I checked out the ADSLguide, also there is ISPreview.co.uk which is very similar.
fobotcso
I rang BT Openworld up yesterday and the CS guy said more or less what you did, now I have had confirmation I may also go for this package.
I know BT are not everyones cup of tea, but in the time that I have been a customer I have no complaints with Openworld.
Also I have had an e-mail from Air Miles/BT Broadband, but I imagine this is the same sort of deal as the Sky one.