Sadiq Khan
'We will defeat you. You will not win'.
London Mayor's spokesperson: 'He is busy'.
'You represent the worst of your country. Sadiq Khan represents some of the best of ours.'
'London Bridge will never fall down.'
'We cannot suspend our election'.
'For what reason will this ever stop?'
Gran with three serious illnesses tells us about the human cost of ignoring air pollution.
And it's powered by sunlight.
There's a pretty big catch though.