This was a shocking attack by a man on a young woman, prompted by nothing more than a brief exchange of words.
It is vital we track down this man and hold him to account for his behaviour.
More top news
A 24-year-old man has been arrested on suspicion of murder after the body washed up on the Thames shoreline.
Seven people have now been arrested after a man died from serious head injuries
The 38-year-old officer was on his way home from a night shift when he collapsed. His death is not being treated as suspicious.