An SNP MSP has branded prepayment meters "a poverty premium" and called on energy companies to stop installing them in households already struggling with the cost of living crisis.
Graeme Dey warned the devices were pushing up the bills were pushing up the bills of thousands of Scots on the lowest incomes.
The meters require customers - often the poorest in society - to pay for their energy by regularly topping up their account online or from credit bought in convenience stores.