The RTS signal, a longwave radio frequency used since the 1980s to control electricity meters that switch between peak and off-peak rates, is being phased out as the technology becomes obsolete. While most UK households use standard electricity meters and remain unaffected, around 105,000 homes in Scotland still rely on RTS meters and have not yet received upgrades.

Consumer Scotland, which raised concerns with Ofgem earlier this month, welcomed confirmation of the phased approach.

Barry Coughlan, head of energy markets at Consumer Scotland, said: “This confirmation of a phased approach is good news for consumers who have been concerned about the impact of the RTS service on their hot water and heating.

“While the rate at which meters were being replaced was improving, there was a significant risk that not all RTS meter consumers would receive a meter upgrade by the time the broadcast signal ended.

“Suppliers must now act quickly to ensure all RTS consumers are identified and their meters replaced in line with the phased approach to the signal switch-off.

“We also strongly encourage RTS customers to engage with their supplier when contacted and get their meter changed.

“Suppliers must have clear plans in place to mitigate any risks to RTS meter consumers when the signal is switched off in their area.”

Consumer Scotland had previously written to Ofgem seeking a number of assurances, including more detail on the phased switch-off plan, the criteria being used to determine regional scheduling, and further protections for consumers during the transition.

The decision to phase the switch-off was also welcomed by Advice Direct Scotland. The organisation has been actively campaigning on behalf of affected consumers, raising concerns about vulnerable households potentially being left without control over their heating and hot water.

Andrew Bartlett, chief executive of Advice Direct Scotland, said: “We welcome confirmation that the full switch-off of RTS meters will not go ahead on 30 June, but it is disappointing this clarity has come so late.

“Announcing such a major change just 12 days before the deadline has caused unnecessary confusion and anxiety.

“Many of those we support have been left uncertain about what to expect and how to prepare. Vulnerable households need time, support and confidence in their energy supply.

“We now need a clear timetable for the phased switch-off, with information on which areas will be affected and when. Energy suppliers must give practical advice in good time, and any issues must be resolved quickly.

“We stand ready to help, but coordination and clear communication are essential.”

With the phase-out beginning from 30 June, both Consumer Scotland and Advice Direct Scotland are urging suppliers to take swift and transparent action to ensure a smooth transition for all remaining RTS users.