| Reference Number | TPC/5/4/531 |
| Title | Upper Theatre and Offices Group Ventilation Louvres Between W1 and W29 North and South |
| Level | Item |
| Date | 01 October 1973 |
| Description | Denys Lasdun & Partners drawing number 552/03/3782. |
| Extent | 1 drawing |
| Series | Denys Lasdun & Partners Drawings |