By Nicola Methven Actor Will Mellor says he was “fuming” after playing Post Office scandal victim Lee Castleton. The 47-year-old asked how those responsible can live with themselves, adding it was “vile” that ex- Post Office boss Paula Vennells got a CBE. The star of Mr Bates vs The Post Office said: “Even when I thought I knew what this was about, I still didn’t until we started shooting. I was angry, I was fuming. I was like, ‘How can they sleep at night, knowing they’re doing this to people – and they’re innocent?’ Lee thought, ‘Oh, I’ll just tell the truth in court,’ and ended up having mo…