From a rag marty understands:
EXCLUSIVE: Mr Khan, wearing a black face mask, travelled to his office at City Hall in a luxury Range Rover from his South London home.
www.dailymail.co.uk
His bullet-proof vehicle, decked out with under-floor blast protection, armoured glass, spike-proof tyres, a five-litre engine and an emergency escape system,
is provided by Scotland Yard for his safety, a spokesperson said.
Mr Khan requires a top level police security detail because of threats to him,' he added.
'The Metropolitan Police provide round the clock protection for the Mayor of London
. This is not a case of the Mayor having a chauffeur-driven car, either provided by City Hall or anybody else. The vehicle is there for his safety.'
Two armed police protection officers, who travelled in a follow-up vehicle, also failed to wear masks.
Mr Khan, the son of a London bus driver, is believed to have been forced to travel by car because he is one of Britain's most high profile Muslims which has led to threats against him.
A spokesman for the Mayor of London said: 'The Mayor does not have a chauffeur-driven car, either provided by City Hall or anybody else.
'The Metropolitan Police provide round the clock protection for the Mayor of London due to the heightened threat level to his safety.'