Families who are still using old-style prepayment meters can beat next month's energy price cap rise if they act now.
The loophole - which only works on old-style prepayment meters, not smart meters - lets you top up your meter now and pay pre-April rates for your energy until you have to top it up again.
Households are braced for the increase in the energy price cap from next month, and those on prepayment meters are hit hardest, with the cap going up to an average of £2017 per year, £37 more than the £1,971 average bill for those on standard credit meters.