Who is Boris Johnson’s special adviser Dominic Cummings?

Tory MPs are calling him dangerous, an unelected foul-mouthed oaf, a man who isn’t even thought to belong to a political party, who’s been found in contempt of parliament and has never played by any of the rules.

Yet the Prime Minister’s special adviser Dominic Cummings is regarded by many as the real power behind the throne, the man who’s driving Boris Johnson’s populist politics and his risky all-or-nothing Brexit strategy too.