Northern Ireland Gym owner Wendy MacBean reported her customer concern to Ofcom in relation to customers being unable to use their key-fob locking properly.
Ofcom despatched engineers from the Spectrum Management Centre to investigate, and on the second visit, using spectrum analyser equipment, identified interference on 433.92 MHz, part of the licence exempt Ultra High Frequency (UHF) band not only used by the Amateur Radio community, but also for short range devices like car key fobs.
The Ofcom engineer team traced the problem to premises nearby. Once inside, they quickly found the cause of the problem – a faulty wireless doorbell. It was switched off and normal service was resumed for motorists out on the street.
Vehicle theft without keys - https://www.autocar.co.uk/car-news/industry/how-crooks-can-steal-your-car-without-key