Thanks for mentioning this, Mole. I wasn't aware of it. As you say, I hope that nothing changes, except for the better (which wouldn't be easy - F2S is one of the very best).
I have no reason to beleive that this might have a negative effect - AFAIK Pipex is a good company, but I guess nothing is certain where takeovers are concerned.
My DSL is on a monthly contract, so that's not a worry in the unlikely event of a drop in quality, though I have websites hosted with F2S as well.