Here's a Mark 4 GP desk from BH in its new home at the Liverpool Institute of Performing Arts. The photos were taken by Colin Heron, who understands that the desk was used by the Today programme. It is therefore presumably the desk from studio 4A, minus the left hand section containing the source selection equipment, etc.
The picture, below right, shows that LIPA also has some Telefunken M15As, complete with their script rests and tape racks. The tape control panel is mounted in the bay in the centre of the picture.