BBC staffers and leading political figures are calling for Sir Robbie Gibb to step down from the BBC board. So, who is the Tory ‘agent’ at the centre of a tangled web of politics and media interests, asks Katie Rosseinsky

Sources say Robbie Gibb amplified criticisms of Trump, Gaza and trans rights coverage, and had ‘a lot of oxygen in the room’

The Liberal Democrat leader said Gibb, who was appointed to the board by Boris Johnson, should have ‘no role’ in appointing the new director general