| Year | 2016 |
| Date | 10-Jun |
| Volume | 216 |
| Issue | 4,536 |
| Page | 848 |
| Category | Railway |
| Part | |
| Title | New Signals |
| Author | Duncan Webster |
| Notes | And his team fit colour light signals to Warrington's Daresbury track. Experience with existing signals, modifications to swing link signal, control board, loss of voltage in control board, characteristics of LEDs, cluster LEDs Mk1, Mk2, array of four individual LEDs Mk3, Mk4, enclosure, an alternative answer to flat batteries, which one is best? Next step, references |