Andy told The Sun:
"For Gordon Brown to go to the Iraq inquiry and tell porkies was outrageous.The war hero sounded a call to arms - warning Britain: "How you vote at this election is going to affect soldiers' lives."
"How little he has given the MoD to help them fight five wars in 13 years is VERY clearly on record.
"To then go straight out to Helmand province in Afghanistan - as he did - and pose for photos with the troops to look like the Forces' friend was unforgivable. That was the last straw for me.
"It was a cynical PR attempt to bury bad headlines. Anyone who uses our soldiers on the front line like that deserves nobody's respect.
"It is a betrayal of everything honourable they stand for."
"After the way Gordon Brown betrayed the Forces, there's not a single person I've spoken to from my old regiment who's voting any other way than Conservative.
"Cameron's got the SAS vote - that's for sure."