Originally Posted by
Globaliser
It was free access to both floors when I last used it, but I think that may have been before domestic and international departing passengers were permitted to mix.
When T5 opened gate 5 handled the few BA flights left and the upstairs section of the old Domestic Lounge became the BA international lounge. It was accessed as the GBL is today. With 'open doors' it was possible to use the lounge for EI and BD domestic flights once everyone had to go through the main terminal to get to their gate. At that stage all BA flights were international.