I’m having trouble suspending my disbelief at the Labour manifesto. The party promises that it will:

Cut the deficit every year
Raise the state pension by whichever is the highest of inflation, average earnings or 2.5 per cent
Protect spending on health, education and foreign aid
Hire an additional 8000 GPs, 20,000 nurses and 3000 midwives
‘Guarantee people a GP appointment within 48 hours, and on the same day for those who need it’
Reduce tuition fees
Not raise basic or higher rate income tax, or VAT, or National Insurance
Give every child a free unicorn
Make rich people, tax avoiders and non-doms pay for it all

I made up one of those promises. If you’re trying to guess which is fictional, here’s a clue: not the most unlikely.