Mayor of London Boris Johnson says Met assistant commissioner John Yates should face difficult questions following the resignation of his boss Sir Paul Stephenson. He singles out Yates’ relationship with former News of the World deputy editor Neil Wallis, who was employed by the Met. Ministers were not informed of the hire.

David Cameron reveals parliament will sit for an extra day on Wednesday, in a rare delay to the summer recess. He extended the calendar so that MPs can discuss the issues raised by today’s media select committee hearing into the phone hacking scandal. Ed Miliband had earlier called for parliament to sit the extra day.

Assistant commissioner John Yates steps down amid intense political scrutiny, including pressure from Boris Johnson. Yates says he is unable to continue in his work while the scandal is still raging. He denies any wrongdoing. Earlier reports suggest he was about to be suspended while the police look at allegations against him.

Police reveal that former News of the World reporter Sean Hoare, who was questioned under caution about phone hacking, is found dead in his flat. Police say the circumstances are “unexplained” but not suspicious. He was the first reporter to go on the record with allegations that Andy Coulson knew about phone hacking.