[andygrif]

Well if the two worked together on the move, which seems sensible, it would look very odd to make a join announcement. Both announcements were made pretty close together, which I would guess is a close as two separate companies could get it.

As for whether it is free or not: Well it would make sense as to why they have introduced the additional cost, as I am sure that it will cost slightly more to provide (what is in effect) an additional 1/2mb of bandwidth, which would explain why the move was taken.

It would be highly irregular to say that the 1mb service no longer exists, but you can move go to 1.5mb for another £3.

It would also explain why 600k customers are only being taken to 750k, as any closer to 1mb would be likely to drive many current 1mb users DOWN to the lower tariff.