Marc Macrae says the SNP ditched him when he fell ill with prostate cancer . He was election agent for party 's Westminster leader Angus Robertson . Mr Macrae, who is now a director of Scottish Enterprise, said that after his diagnosis in 2010, he had been told by senior figures at the SNP, including then First Minister Alex Salmond and former SNP questioned commitment while he was fighting illness in 2013 . Mr Macrae is now backing the Tories - and wants them to beat his old boss .
Marc Macrae says the SNP ditched him when he fell ill with prostate cancer . He was election agent for party 's Westminster leader Angus Robertson . Claims SNP questioned commitment while he was fighting illness in 2013 . Mr Macrae is now backing the Tories - and wants them to beat his old boss .