The outgoing Prime Minister made the prediction as he confirmed support for a new nuclear project.
Mr Johnson, speaking in Suffolk as he confirmed support for the Sizewell C nuclear power project, said: “We’re helping people now with the cost of living and of course there will be more cash to come, whoever takes over from me, in the months ahead – substantial sums, that’s absolutely clear.
”During his speech, Mr Johnson compared the benefits of nuclear investment in reducing energy bills to buying a new kettle.
He said: “If you have an old kettle that takes ages to boil, it may cost you £20 to replace it. But if you get a new one you will save £10 a year every year on your electricity bill.”