There are two main types of smoke alarm tech, says Raman Chagger, principal consultant at BRE, the Building Research Establishment. Ionisation-based systems use a tiny amount of radioactive material to charge, or ionise, particles in the air which flow between two small plates. Should smoke interrupt that flow of charged particles, the alarm goes off.
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There are times when it feels as though the entirety of British horse racing exists in a state of perma-gloom, bewailing an ageing fanbase, declining attendances and a moribund, factional leadership. It is, so the narrative goes, a sport in slow but irreversible decline, waiting for the inevitable moment in 10 or 20 years’ time when someone finally comes along to turn out the lights.