The 4th floor of West Block was double height so the vast majority of the building didn’t have a 5th floor. There was only a 5th floor above G and M core where there was a water tank and lift motor room.
G core
G lift motor room and machinery 
G core ‘penthouse’ control panel 
G Core cold water storage tank 
G lift motor 
G lift motor room’s small window 
G lift motor room and machinery 
G lift control cabinet
M core
M lift motor and machinery 
M lift REM panel 
M lift main power switch 
M core lift motor room 
M lift control cabinet 
M core CWS tank 
M core control panel, 5th floor 
M core 5th floor plant room
Upper part of W404 air conditioning plant room.
Not a 5th floor as such but there was an upper level of the air conditioning plant that served W404.
4th floor plant room by W404 
4th floor plant room by W404 – ducts at high level 
4th floor plant room by W404
Last updated on Monday 11 February 2019 by GaryReggae