London mayor talks up coalition-building, highlights his environmental record, and worries national Labour party is on the wrong track

W

hen Sadiq Khan was first elected as mayor of London 10 years ago, Barack Obama was US president, the UK was still in the European Union and Leicester City had just been crowned the unlikely champions of the English Premier League.

In the intervening decade, Donald Trump has gone from reality TV star to two-time US president, the UK has had six different prime ministers, and Brexit has convulsed the country. London has been rocked by tragedies ranging from terror attacks to the Grenfell Tower fire.

Through it all, Khan, the son of a bus driver from south London, has remained a constant. Still less well known than his predecessors, the leftwing radical Ken Livingstone and the divisive Tory populist Boris Johnson, Khan has been mayor for longer than either and at the last election easily saw off his latest Tory challenger.