The Soldiers From The Sky project, organised by the council, commissioned research into the ways stately homes, airfields and churches were used during the war.

An information board at Easton Walled Gardens, near Grantham, was unveiled on Thursday, which pays tribute to the heroism that won Mr Grayburn's father Britain's highest military accolade.

It is also telling the story of the location's role training airborne crews who parachuted into the Dutch city for the Battle of Arnhem, which was part of Operation Market Garden - an ambitious military offensive designed to speed up the invasion of Nazi Germany and shorten the war in Europe.

Mr Grayburn said he knew very little about his father's time in Lincolnshire during the war.

"I knew he was here, I have his diary and it mentions coming here, but I didn't know anything about what training they were doing while they were here. How they kept the morale up," he said.

"I think it's crucial people remember what happened."

Brian Riley, heritage advisor for Soldiers From The Sky, said he felt "greatly privileged and delighted" to be involved.

He said he hoped the project would "shine a light on a less well-known aspect of Lincolnshire's heritage".

He said: "We focus on trying to fill in the gaps of what the lads did to prepare for action.

"They would attack farmhouses and other buildings just to carry out tactical exercises to make sure all their skills, all their drills, were properly understood.

"My own father was in airborne forces in the Mediterranean during the war, so I feel a personal connection with what some of the guys went through.

"It's been fascinating to learn the stories, filling gaps in my own knowledge and help, hopefully, contribute to filling in gaps in the knowledge of other people."

Soldiers From The Sky project keeps Arnhem troops' memories alive