| Reference Number | TPC/5/4/6 |
| Title | Lower Auditorium, Level 21.25 Perch |
| Level | Item |
| Date | September 1968 |
| Description | Denys Lasdun & Partners drawing number 552/1049/6 issue C. Original date June 1968. |
| Extent | 1 drawing |
| Series | Denys Lasdun & Partners Drawings |