There are a few public officials who have direct access to the Home Secretary. Amongst them are the Commissioner of Police of the Metropolis, and the Director of Public Prosecutions.
If the Commissioner on the 27th was too busy stuffing himself with prawn vol-au-vents and lashing out at Boris at his leaving do to pick up the phone to Jacqui Smith, then Kier Starmer, one assumes, might have bestirred himself to do so.
The Times tells us he was informed in advance of Damian Green's arrest. We must know whether he contacted either Normington or Smith. If he didn't, he is remiss. If he contacted Normington and he failed to tell Smith, Normington is remiss. If he told Smith, then she has lied and must resign.