These drawings are likely by Flint & Neill Ltd as their information is capitalised, but they also contain Denys Lasdun & Partners and Davis, Belfield and Everest information in the drawing details. They have arranged them into the following series:
E: Electrical drawings (E/Wc: conduit layouts)
S: Structural drawings (S/P: scenery pit, basement, foundation and ground floor plans; wall elevations and sections; car park ducts; fly tower; and Upper Auditorium steelwork and raft footing; S/R: Studio Theatre reinforcement details;
S/T: roof steels and trusses, wall anchorage, raft foundation and footing, wall elevations and sections and carpark ducts (Studio and Upper Theatres); S/W: wall elevations, Upper Theatre fly tower, Studio Theatre, basement and ground floor plans and sections)