I'm not sure this quite qualifies as 'Cala 4', but The Planning Inspectorate has just issued a statement on its website offering guidance on the current state of play.

We are told that that "...pending determination of the challenge, decision makers in local planning authorities and at the Planning Inspectorate will in their determination of planning applications and appeals need to consider whether the existence of the challenge and the basis of it, affects the significance and weight which they judge may be given to the Secretary of State’s statements and to the letter of the Chief Planner.

So, that's clear then.....