“Let's not stop at Brexit. It's time London declared independence”

It became more interesting to me in the middle with

'Perhaps full independence is unlikely – but what about greater devolution for London?'

and

'Localism has been a big part of David Cameron and George Osborne’s agenda, with the latter striking a number of “city deals” to devolve more powers. The new Mayor of Manchester, whether Andy Burnham or not, will have control over more policy areas than the Mayor of London, such as over health and housing.'

but I'm not British and don't have much context and don't know whether the Telegraph is still the Torygraph.

I am not sure Londoners would love the landlocked existence. And having all their food delivered by plane. And paying lets say 1000-2000% of the current utility bills.

And with the City and the institutions in London - no way in hell the mayor of London to get more independence. He gets way too powerful that way.