The Radio Teleswitch Service (RTS), a decades-old technology used to control electricity meters via longwave radio signals, is set to begin a phased shutdown from June 30, with full switch-off expected by the end of September. Although most homes use standard meters and will remain unaffected, over 100,000 households in Scotland still rely on RTS meters, many of which have not yet been replaced.

Consumer Scotland and Advice Direct Scotland have both written to energy regulator Ofgem, warning of serious consumer harm unless urgent steps are taken to support those at risk — particularly vulnerable households and those in rural or remote areas.

“While we are encouraged that the rate at which RTS meters are being replaced is improving, there remains a significant risk that not all RTS meter consumers will receive a meter upgrade by the time the broadcasts end,” said Barry Coughlan, head of energy markets at Consumer Scotland.

“In these circumstances, it will be essential for suppliers and Ofgem to have clear and robust plans in place to mitigate the risk to RTS meter consumers of a potential loss of heating and hot water following the switch off.”

Andrew Bartlett, chief executive of Advice Direct Scotland, warned of a “looming crisis,” citing a growing number of calls from worried consumers to the organisation’s energy advice helpline.

“With less than a month to go until the RTS signal starts being switched off, it is increasingly clear that progress on replacing them has not been fast enough,” Bartlett said. “Ofgem needs to urgently clarify if it intends to stick to the June 30 deadline and if a phased approach is being taken, which parts of Scotland will be affected first.”

Bartlett also urged energy companies to proactively identify and prioritise vulnerable customers for urgent upgrades, and called for a renewed public awareness campaign to ensure those at risk are informed of the impending change.

One distressed customer from Wishaw reported spending £700 on kitchen repairs after being required to install a smart meter. Others are receiving installation dates well after the June deadline, raising concerns about a lack of preparedness across the energy sector.

Consumer Scotland is seeking a series of urgent assurances from energy suppliers and Ofgem, including:

• Clear information on which regions will be affected when, and the criteria for the phased switch-off.
• Accessible appointments for consumers in remote and island communities.
• No unexpected costs, such as rewiring, for affected customers.
• Extra support for those with high energy needs or in vulnerable circumstances.
• Robust contingency plans to prevent loss of supply or higher bills post-switch-off.

Consumers are being encouraged to check their meters and contact their energy supplier immediately if they believe they may be affected. Free support and guidance is available via energyadvice.scot or by calling 0808 196 8660.

“Our message to consumers is simple,” said Bartlett. “If you know someone with an RTS meter — especially if they are elderly or vulnerable — make sure they’re aware of the situation and seek help now. Nobody should be left out in the cold.”