His work can fetch up to £5,000 and has been bought by the likes of Sir Elton John. But before he found fame and fortune, the graffiti artist Stik was homeless. That is why he's decided to donate tens of thousands of signed prints to help others just like him.
Nick Thatcher reports.
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John Cantlie, who worked for a number of Fleet Street newspapers, is thought to have been taken hostage in November 2012.