Ah, I dreams of cable modems...
Last I saw in the UK there were just 40,000 users hooked up to DSL lines. ISDN hasn't really taken off as a mass domestic phenomenon, and probably the majority of users still rely on dial-up connections, usually metered by the minute (although BT has a free connection option, for which you pay).
Maybe that's why so many of us Brits access the 'Cat during working hours.