10-11 floors above ground - Offices, general staff. 5 or more floors underground housing a command centre, labs, workshops, etc. Green-tinted Glass, Tripple-Glazed Unmarked corridors Except for: floor plans and exit signs on the walls Acronyms on the doors The floors have open-plan offices with partitions and there is a staff bar overlooking the Thames. Entrance: A row of six perspex, time-locked security doors swipe card slot and entry personal code, six-nine-two-one, illuminated small green light by the slot Perspex door slid open with a Star Trek - like swish. Narrow capsule -shoulders brush sides A pressure pad on the floor door swished shut then the door in front opened into the inner lobby. (DAM Gates) Ceiling and Walls: Soft fluorescent light from recessed port-holes in the high ceiling illuminated a hard-wearing ivory marble floor (TWINE), set off by the matt grey slate of the walls (GE). Several marbled hallways (TWINE) led off from the sides of the central atrium Two giant columns dominated the hall, containing banks of rapid modern lifts Around the edge of the columns were inset comfortable black leather bench seats fire stairwells. A few steps down the first hallway revealed the library expensive-looking reading tables and swish sliding book racks through a steel door next to the library exit and through to a small grey-carpeted gymnasium with rowing machines and weights an indoor pistol range / indoor five-a-side soccer and badminton sports hall. fourth floor and the doors opened on to a small lobby with corporate grey carpet tiles and bare white walls, like a 1980s merchant bank. Small coloured floor plan conveniently placed by the lift exit labyrinth of corridors Open-plan PTCP (Production-Targeting Counter-Proliferation) department office overlooked the building's spacious open-air terrace and the Thames, and accommodated half a dozen officers and secretaries. Office Bar on Terrace Etrance the lift up to the eighth floor M's office in Skyfall is located just behind the flag.