More from our Political Correspondent Simon Harris:
Johnson: The 20/20 vision is there as another bench-marking tool but it's not the only one. @itvlondon
Johnson and Hogan-Howe are asked why rape is not included in the list of seven targeted crimes. @itvlondon
More top news
Nick Herbert, 45, was so frustrated by his son not answering his phone that he designed an app that torments recipients until they reply.
Charlie Alliston, 20, collided with HR consultant Kim Briggs, 44, at OId Street, central London in February last year.
The weapon was found by a member of the public in bushes in Greenford.