I too am self-employed but use a second line through NTL: Home. Is it really cheaper to use the :Business service? I don't see any pricing info on that link (though that may well, as usual, be because I can see wood for trees

). And don't forget, as I did, that Business rates quoted exclude VAT.
I'd also be grateful if anyone has knowledge whether the speed upgrades will apply to Business broadband as I'm still debating whether to switch (although mainly to get a static IP in the hope that emails won't take up to three days to reach me/addressees!).