This is the BBC WORLD NEWS GALLERY shortly before BBC TELEVISION CENTRE was decommissioned. The channel had already relocated to New Broadcasting House by this point but the studio and gallery were still operational - albeit unstaffed.
It's possible that the adjacent studio was still being used for the odd recording and/ or training or that the equipment was being left running so that - in an emergency - the channel could relocate to TVC and resume broadcasts.
The gallery, tucked into one corner of the News Room, was originally build for BBC NEWS 24 (aka The BBC News Channel) and sat right next to the semi open plan studio itself. The studio was originally built for N24 but extensively reconfigured for BBC WN when the News Channel started sharing the studios used for BBC ONE bulletins.