New appointee will be tasked with 'championing the value of London's night time culture.'
The water cannons were purchased by his predecessor for the Metropolitan Police after the London riots.
London is responsible for 22 percent of the U.K.'s overall GDP.
The right-wing group targets Muslims in direct action protests.
London's newly elected mayor lays out the argument for staying in the EU.
As the father of two teenage girls, Khan said he is concerned that adverts demean women.
Trump wants a "total and complete shutdown" of Muslims entering the U.S.
Conservative opponent Zac Goldsmith's campaign was slammed as racially divisive.
Kahn says he will launch a review if elected.