The 2023 UKCA marked boiler by Western Steam has had hydraulic and steam tests with new certification issued. All water feeds - injector, crosshead and hand pumps - worked with quiet efficiency, the safety valve is a pop-type device giving reliable closing.
On test the engine proved free-steaming and ran well in either direction, keeping itself in steam and water without need of the blower.
| gauge | 5 inch |
| length/inches | 41 |
| width/inches | 10 1/2 |
| height/inches | 15 |
| weight/kg | 61 |
| wheel material | cast iron |
| axlebox type | plain bearing |
| cylinder material | cast iron |
| valve type | slide |
| valve gear | Stephensons |
| reverser type | pole |
| injector(s) | 1 |
| boiler number | WSME.1948.01.23.H.V.S |
| year built | 2023 |
| boiler maker | Western Steam |
| CE mark | UK CA |
| working pressure/psi | 90 |
| boiler type | locomotive |
| boiler material | copper |
| boiler construction | silver soldered |
| hydraulic test valid to | 30-Nov-2029 |
| steam test valid to | 14-Feb-2027 |
| superheater(s) | 2 |
| superheater type | radiant |
| safety valve(s) | 1 |
| safety valve type | pop |
| mechanical pump | 1 |
| hand pump | 1 |
| whistle | yes |