Labour's Corbyn calls for investigation over report he is "too frail" to be UK PM

British opposition Labour Party leader Jeremy Corbyn called on the head of the civil service to investigate a Times newspaper report which cited unidentified senior officials as saying they were concerned he was too frail to be prime minister.

"This matter has inevitably undermined confidence in the principle of civil service neutrality, which is integral to the healthy functioning of our democracy," Corbyn wrote to Cabinet Secretary Mark Sedwill. "I would urge you to ensure that there is a speedy and thorough independent investigation, rather than one carried out by the Cabinet Office," Corbyn wrote.