He was wearing green and white trainers, navy jogging bottoms with ‘money’ written up the side and a grey hoodie. He also has a gold hoop in his ear.
Simon has links to a number of addresses in Aylesbury but is known to particularly frequent the Quarrendon, Buckingham Park and Meadowcroft estates.
Thames Valley Police investigating officer, Inspector Gareth Jenkins, based at Amersham police station, said: “I would like to appeal to anyone who has seen Simon, or who has any information which could help us locate him. We are increasingly concerned for his welfare.
“If you have any details which you think could be relevant, please call 101, quoting reference number 43200270894.”