Facts

Boris Johnson gave a personal guarantee promising not to raise National Insurance in the Conservative manifesto, with his signature attached for extra emphasis at the bottom of the page. 

On September 7th 2021, it was announced that the government would be increasing National Insurance by 1.25 percentage points. 

Verdict

Boris Johnson gave a personal guarantee promising not to raise National Insurance in the Conservative manifesto, with his signature attached for extra emphasis at the bottom of the page. His government raised National Insurance less than two years later.