He said the theft was a complete shock. The trailer had been parked up on a quiet cul-de-sac for a few days after he went through a health procedure that left him temporarily unable to drive.
He thought it was safe but when he went to leave the house around 9am on Saturday, the trailer was gone.
"It stopped me right in my tracks," Lunn said.
"It just makes you feel sick, that invasion of your privacy, that someone is helping themselves to your stuff."