There are so many reasons why Priti Patel must go.

Boris Johnson’s decision to back Priti Patel and disregard the findings of his adviser on ministerial standards that the home secretary had bullied staff is being challenged in court.

The FDA union will be arguing that Boris Johnson’s interpretation of the ministerial code should be subject to the rule of law.

The argument is the ministerial code is the only means by which civil servants can raise complaints against the conduct of ministers and it is vital that decisions on this are subject to the rule of law.