A part-built 3 1/2 inch gauge "Britannia", comprising a well-advanced chassis built to a fairly pedestrian standard, parts and castings for locomotive and tender, and a silver soldered copper boiler by Cheddar.
| gauge | 3 1/2 inch |
| boiler number | CM1235 |
| CE mark | n/a - pre-2002 |
| working pressure/psi | 90 |
| boiler type | locomotive |
| boiler material | copper |
| boiler construction | silver soldered |