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.
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The killer's solicitor has written to police challenging them to prove his confession.
Tottenham last won the league back in 1961 - but they are feeling confident after a string of great performances this year so far.
Crimestoppers are offering the reward as police say they are becoming increasingly concerned at the viciousness of the assaults.