This bit is undeniably true: The more young people vote, the better it's likely to be for Labour. Ipsos estimated that people under 25 voted for Labour over the Conservatives by 43% to 27%, with the remaining 30% voting for other parties. (That's roughly in line with what other surveys have suggested.)

So what level of extra turnout would be needed for young people to have handed the election to Labour? Well, the original tweet said a 30% increase, so let's chuck that into our big nerdy spreadsheet and see how it goes.

A 30% increase would mean a new turnout of around 56% – which would have meant an extra 737,000 young people voting. Or perhaps they wanted us to just add 30 to 43? It's unclear. If so, 73% would have meant 1.7 million more votes.

You've probably spotted that either way, neither of those numbers is big enough to overturn the Tory lead in the popular vote, even if every single one of them voted Labour.