Two No10 figures failed to return their Partygate questionnaires, police have admitted.
In a letter to Lib Dem chief whip Wendy Chamberlain, seen by the Sunday Mirror, Deputy Assistant Commissioner Jane Connors said that of the 204 questionnaires sent out, two were not returned.
Scotland Yard will now be under pressure to say whether the two figures are ministers or members of staff, and whether they went on to be fined despite failing to return the forms.