Reports say the plans could cut gas and electricity costs by £100 a year for 17 million families.
Experts point out that the 0.89% deal comes with significant upfront costs.
Chancellor hints Tory manifesto may drop pledge not to raise income tax, national insurance or VAT.
Do car finance deals spell trouble?
Are lower earners bearing the tax burden?
Is it legally possible to avoid them?
What every woman should know
15 changes to your finances in April
Maternity pay 'inadequate' say mums
Will and Kate on their new mental health campaign