The family of a missing Cambridge graduate are appealing for help after he disappeared from Mitcham on Thursday.
Harry Ogg, 21, disappeared on Thursday after visiting his parents in Mitcham.
Mr Ogg, a pianist who graduated from Cambridge in June, was last known to have arrived at Wimbledon station at 9.20pm on Thursday evening (October 11) using his Oyster.
A facebook site to help find him has already attracted more than 14,000 members.
Yesterday morning his brother, Tom Ogg, posted a message appealing for his brother to come home.
Writing on the Facebook group ‘Missing - Harry Ogg’, he said: "Harry is very unwell, and my family and I are concerned that he will hurt himself.
"He is very down.
"He ran off after seeing a doctor about his current state.
"Needless to say we are very concerned about him.
"We suspect (hope) he may be staying with a friend who we don't know - so please, could you all add Harry's friends and anyone else who might know Harry, so that it gets around that Harry is missing, please?"
Mr Ogg was last seen wearing a navy-blue duffle coat and blue jeans, glasses and pointy brown shoes.
During his time at Cambridge the music student won the University Musical Society's conducting competition two years in a row and had recently led the University Chamber Orchestra on a tour to Bordeaux.
Tom Ogg added: "Harry is a star of the musical community and people are very affectionate toward him.
"He is a big part of that community and that’s one reason why so many people have joined.
"A lot people are concerned and lot of people care."
Anyone with information should call Merton Police on 101.