| Reference Number | TPC/5/6/228 |
| Title | Details of Hinged Trap in Grid Floor - Upper Theatre, New National Theatre |
| Level | Item |
| Date | 13 April 1973 |
| Description | Mole-Richardson (Stage & Studio Engineering) Ltd drawing number D18-82. Works number 3570. Drawn by R M. |
| Extent | 1 drawing |
| Series | Mole-Richardson (Stage & Studio Engineering) Ltd Drawings |