More than a quarter of households do not know if they are on the most expensive standard variable tariffs (SVTs) for gas and electricity and around one in 20 do not know who supplies their energy, a survey suggests.

The poll for Bulb Energy found 6 per cent of people do not know who their supplier is, while 28 per cent either do not know or are not sure if their household is on a poor-value standard tariff.

This figure rises to 53 per cent of 18 to 24-year-olds, while a relatively low 16 per cent of 55- to 74-year-olds are in the same position. The poll also suggests that households may be confused over whether they have switched away from SVT tariffs.

Some 44 per cent said they had switched in the past year, but Bulb cited industry body Energy UK figures showing that 22 per cent of the UK’s 27.1 million households switched last year.

Bulb said it was surprised that half of the “most technically savvy generation” appeared not to know what type of tariff they were on, but said this could be due to 18- to 24-year-olds typically renting accommodation and mistakenly believing they were unable to switch, or inheriting prepayment meters at properties that often carry restrictions on switching.

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