| Year | 1987 |
| Date | 17-Apr |
| Volume | 158 |
| Issue | 3,799 |
| Page | 447 |
| Category | Locomotive |
| Part | |
| Title | Improvements to Simplex. Useful modifications to the popular Simplex locomotive design |
| Author | Martin Evans |
| Notes | Trailing horns, centre frame stretcher, bunker water air vent and union positions, water pump, reverser stand, boiler bush, boiler firebox area, grate, ashpan, bunker water tank, hook, feed pump connections |