I keep seeing people on here saying Boris Johnson was a better Mayor of London than Sadiq Khan, and I'm sorry but that's just wrong. I'll grant you Khan has not been a great Mayor - none of them has - but worse than Johnson? No. A lot of this stems from Johnson's present campaign to be Tory leader, where he's been boosting his record as Mayor. He seems to have been doing this mostly unchallenged, so let's have a quick look at his time running London.

Many thousands of years from now, Earth is a ruined wasteland. The soil is dead, the air poisoned. Once-mighty cities have been reduced to bleached eroded stumps by supersonic icestorms and long months of unbearable sunlight. In the wreckage, tardigrades the size of chows hunt gigantic cockroaches for food, while in the seas jellyfish the size of Rhode Island have evolved to metabolise gyres of indestructible plastic. All is gone.