Boris Johnson gave nothing away as he was asked about Labour's appointment of 'partygate' report author Sue Gray as Sir Keir Starmer's new chief of staff. <br /> <br />Allies of the former PM have criticised the move, saying it puts a question mark over the integrity of her inquiry, but Mr Johnson kept quiet when asked for his thoughts on the matter. Report by Buseld. Like us on Facebook at http://www.facebook.com/itn and follow us on Twitter at http://twitter.com/itn
