The Radio Teleswitching Service (RTS), also known as the BBC’s long wave signal, is the same signal that powers Radio 4 on long wave, the shipping forecast, and even test cricket broadcasts.

Some electricity meters rely on this signal to switch between peak and off-peak times and to control heating and hot water.

The BBC plans to switch off this signal on 30 June 2025. Similar to the transition from terrestrial to digital TV, this is a nationwide upgrade to a new technology.

When the RTS signal is turned off, your meter could get stuck on the last schedule it used. This means it’ll be out of sync with your tariff’s peak and off-peak hours, which could end up costing you more. 

If you have an RTS meter, it will need to be replaced. Energy company’s will be reaching out via letter or email with details on how to book your meter replacement.

Image below shows a Radio Teleswitching Service (RTS) meter.