Interesting. I've never seen that in the Nordic countries or the US. Typically either the wifi is just open entirely, or there's a WPA password written on a little card by the cash register. Helsinki even has open wifi across the whole downtown, and in Denmark all the Baresso locations have open wifi (no login or password). Does the UK have laws requiring the hotspot providers to collect that information, or are they doing it of their own accord for marketing or abuse-reduction reasons?