In unveiling his party’s manifesto, Boris Johnson promised yesterday that a Conservative government would make the country Carbon neutral by 2050 and Corbyn neutral by 2020, or Christmas. It was a typically irreverent slogan of the kind the Prime Minister favours.

What was striking about the rest of the manifesto is that beyond the slogans it was, well, not particularly striking at all. Compared to the Labour document, unveiled last week by Jeremy Corbyn, the Conservative manifesto is remarkably sober both in its pledges and in its size. At a total of 59 pages, it is a much more succinct document than Labour’s sprawling 104 sides.

Johnson’s manifesto spending commitments are dwarfed by those of the other parties – in his document, he is pledging a further £2.9 billion of investment per year compared to an estimated £6.3 billion from the Liberal Democrats and £8.3 billion from Labour.