| code | size (mm) | price (£) | old code |
| 50-11 | 15 x 25 | 20.00 | BS41 |
| 50-12 | 25 x 40 | 30.00 | BS42 |
| 50-13 | 38 x 60 | 36.00 | BS43 |
| 50-14 | 50 x 75 | 40.00 | BS44 |
| 50-15 | 75 x 110 | 70.00 | BS45 |
| 50-16 | 100 x 150 | 89.00 | BS46 |
| 50-17 | 150 x 220 | 160.00 | BS47 |
| 50-18 | 200 x 300 | disc. | BS48 |
| 50-19 | 250 x 355 | disc. | BS49 |