erm, that is a bad thing...
the reason BT are celebrating it is because they want to drop their prices, they want to crush the competitors by making a loss just like they have always done to maintain their monopoly.
the only reason there are any competitors is because of the ruling that BT were allowed to put up their prices on the condition that they locked them there and would not reduce them, this then allowed competitors to operate - prior to this many companies tried, but BT just dropped prices in that area knocked them out of business and then put prices back up again
all this will do is knock out all of the competition again, every single exchange with a rival operator on it will have BT making a loss selling cheaper than the competitors, the competitors will go out of business, BT will put prices back up, and then you'll be stuck with things even more expensive than they are now, and nobody to turn to
the only competitors with any chance of survival are NTL:Telewest, and they wouldn't have stood a chance without the recent merger - nobody else is set to survive BTs being allowed to take over again, and i doubt NTL:Telewest will make it through without being seriously hurt
you are celebrating handing the monopoly back over to BT, you sure you want that? I certainly don't