Originally Posted by Speedbrian747

I think it's only being referred to that at the moment because part of the middle of T4 ticketing is still closed (it's not even there at all at the moment, under reconstruction). Eventually T4 'west' and 'east' will meet and form one large ticketing hall, with BA and JAL at the west end.

The new TSA checkpoint there has been approved to open for business, so it will be ready to go for the first day of BA operations on the 24th. BA passengers can either use the new checkpoint which opens up into the T4-TBIT connector, or go to TBIT and use the old one if they prefer. Either way, all BA flights will still be using TBIT gates.