We've known for a little while, in a general way, that this has been implemented. But I for one still haven't got my head round the details. I'd be very interested to work at finding out more (by means of a separate thread if our mods think that would make more sense).

What determines the relevant market, and to what extent can I influence it? What role is played by my residential address, BD's UK base, the country from which I want to start my trip...? When searching in advance of calling the ICC, how relevant (and how potentially misleading) are (1) my choice of search tool and method, (2) the IP address I log in from, (3) any country and language selections I make when logging in, (4) other factors?