(BBC) Boris Johnson has said the “grim reality” is that “some people can’t be rehabilitated” in prison.
The PM called for longer sentences and an end to automatic release after convicted terrorist Usman Khan killed two people on London Bridge on Friday.
The father of Jack Merritt, one of the victims, says he would not wish his son’s death “to be used as the pretext for more draconian sentences.”
Labour have accused Mr Johnson of using the attack for political ends.
And in an article for the Guardian, Mr Merritt’s father Dave said his son “would be livid his death has been used to further an agenda of hate.”