The boss of Centrica says it is "too early" to speculate but if oil costs continue to rise, homes will be hit.
Savvy bill payers shopping around for fixed-tariff energy deals also dented earnings at British Gas.
Chris O'Shea, the boss of Centrica, which owns British Gas, says the energy transition is correct, but worries over the impact on jobs.
A list of nearly 500 employers fined more than £10m for failing to pay the minimum wage is released.
The takeover will give Centrica greater control of liquified natural gas supplies in the UK.
UK's largest gas storage facility will miss £2bn investment without help, boss of Centrica tells BBC.
Experts say the UK has enough gas after Centrica said storage levels were "concerningly low".
Centrica says it is installing four ultra-efficient hydrogen-ready engines at its site in Brigg.
Centrica chief executive Chris O'Shea gets £4m more in 2023, up from £4.5m the year before.
