Now Boris Johnson, whether he meant to do so or not – has revealed Conservative plans for a tax cut for working people.
Speaking to workers on Teesside – he appeared to blurt out a new policy to raise the threshold for paying National Insurance.
Mr Johnson later explained that from next year people would only pay on earnings above £9,500. Today’s focus was meant to be on the Liberal Democrats – who’ve launched their manifesto. Our political editor Gary Gibbon reports.