In a less than subtle dig at veteran Jeremy Corbyn, Andy Burnham tells GQ that MPs should stand down after 25 years:

“I think modern politics is intense – it’s changed in my 14 years in Parliament. I always felt I would give it my all for 20, 25 years. Never put a time limit on it but then maybe finish off my career by doing something different. If you’ve had a seat for 25 years, people should let some new thinking in.”

Hang on a minute.

Andy Burnham was elected to parliament in 2001.

If he wins the Labour leadership and wins the general election, admittedly big ifs, he would become Prime Minister in 2020.

Yet sticking to his rule of standing down after 25 years in the Commons, that means Burnham would have to quit in 2026. So he would only be able to serve one term as PM.

Further proof he can’t do maths…