Sir Keir Starmer has appointed partygate investigator Sue Gray as his chief of staff, prompting some Tory MPs to say her inquiry was a "Labour stitch-up". But she will have to set out the timeline of her discussions with Labour, including when she first began talking to Sir Keir about the role. Not the only one facing questions, Boris Johnson is soon to appear in front of a parliamentary committee looking into whether he misled parliament. On the Sky News Daily, host Niall Paterson is joined by our political correspondent Joe Pike to make sense of the battle for integrity in politics.Producer: Soila ApparicioEditor: Philly Beaumont