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 October . 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 .