Max Hastings, a former editor of Boris Johnson during his time as a journalist, has described the Mayor of London as "utterly chaotic".
Interviewed for a documentary about Johnson, to be screened by the BBC tomorrow night, Hastings said: "Supposing he became Prime Minister, the idea of Boris Johnson's finger on the nuclear button ... one day he would get it mixed up with the one to call the maid"
More top news
The two children of murdered MP Jo Cox will unveil a coat of arms in the Houses of Parliament in a touching tribute to their mother.
Evacuated residents have expressed anger and confusion at unexpectedly being told they had to leave .
Following the Grenfell Tower fire, Thirteen Group has been checking its 20 tower blocks.