Stephen died in hospital yesterday after a long battle with bowel cancerThe 19-year-old raised more than ??3million for the Teenage Cancer TrustHe was supported by celebrities including Russell Brand, Piers Morgan, Sir Chris Hoy and Alan Davies - he also received a visit from David CameronThe Prime Minister led the tributes, praising his 'spirit and bravery'Comedian Jason Manford, who championed S