As someone said in the Commons just now, she'll get it done more quickly if she investigates the days when there weren't any parties.
Why shouldn't Johnson just put the record straight now? He knows if there was a party on 20th May and he knows if he was there or not.
It's a fair question, and you might add that if he wasn't at the party, you would expect him to scotch that immediately. But he's surely within his legal and procedural rights to insist on waiting for the report he commissioned to be published before commenting. All anyone can expect for now is the report is delivered in a timely manner.

