
Photograph: Colin T Gifford/SSPL via Getty Images
When I was a trainspotter in the 50s and 60s, railway signals were mostly of the semaphore type operated by wires and men in signal boxes, and I don’t remember “signal failure” ever being a cause of disruption to services, whereas nowadays it is a daily occurrence. Is the new technology more trouble than it’s worth, or is my memory at fault?
David Harrison, Brighton
Post your answers – and new questions – below or email them to nq@theguardian.com