Apology comes after head of Met police said Green party leader risked undermining public confidence in his officers

Zack Polanski has apologised for sharing a social media post critical of police after the Golders Green stabbings, after the head of the Metropolitan police said the Green leader risked undermining public confidence in his officers.

Polanski, who leads the Greens in England and Wales, said he was sorry for having shared someone else’s post “in haste”.

Keir Starmer, speaking to the BBC before the apology, described Polanski’s actions as “disgraceful” and unfair on police faced with making split-second decisions.

Police were filmed detaining the suspect after two Jewish people were stabbed in the north-west London suburb on Wednesday. Footage of the arrest shared on social media shows two officers appearing to kick the man on or near his head.