Boris Johnson committed a "clear and unambiguous" breach of ministerial rules by taking up a new role writing a column for the Daily Mail, a Parliamentary watchdog has ruled.
The Office of the Advisory Committee on Business Appointments (Acoba) has delivered the damning verdict as it called for a complete overhaul of Government rules.
Former ministers are not permitted to take up or announce new appointments until the committee has been able to provide advice - a process Mr Johnson brazenly flouted.
