The victim has been named locally as Joshua Folkes, or "Money J" as he was known to his friends. Friends have left cards and flowers at the crime scene. One read:
Rest in perfect peace and you be happy. I hope you're all right up there. Never forgotten.
Another simply said
There has also been an outpouring of grief on social media. On Facebook, Kate Louise Williams said:
This morning we say good night to Joshua stabbed to death last night our thoughts are with family and friends today.
More top news
Members of the Queen's Guard have been assigned the protection of armed police, amid reports they could be targeted by terrorists.
When Robin Ollington wrote to Buckingham Palace suggesting they introduce a Christmas tree, he didn't expect them to write back...
New research by consumer group Which? has revealed the most delayed flight route of the year ending in August 2014 was to London Gatwick.