The RAF Radar Museum has been given the green light to build a workshop to house a Second World War mobile radar unit thought to be the last of its kind left in the world.

North Norfolk District Council has given permission for the attraction at Neatishead in the Broads to build the new structure to house its Type 14 Mobile Radar unit.

Carl Lamb, a museum trustee, said the unit landed in Normandy on the first day of the D-Day, directing Allied aircraft towards their targets and warning of enemy fighters.

Mr Lamb said: "We're led to believe it's the only one left in the world. That particular radar went ashore on D-Day, on the first day of the battle, so it's obviously quite unique."

Mr Lamb said the unit had been parked outdoors since the museum acquired it about 10 years ago, and now storing it indoors had become a vital matter.

He said it would cost around £100,000 to build the new workshop, which will also give the museum a place to restore it and other items of historical interest.

Mr Lamb said: “It’s expensive but what price do you put on heritage? It's currently kept outside and is being hammered by the elements and the weather.

"By having a workshop, people will be able to come in and see it being worked on. That will help bring it alive, rather than just having it as a static exhibit."

Anyone interested in donating can contact Mr Lamb by email carl.lamb1988@gmail.com or phone 07764 222603.

Mr Lamb said little else was known about the unit's origin or history, and asked if anyone who could shed more light on it to get in touch with the museum.

"We're trying to find out more about its pedigree," he said.

The museum is on the site of the former Royal Air Force radar and control base, RAF Neatishead.

Its other exhibits include cockpits from aircraft including a Jaguar and a Tornado, as well as a Nuclear Reporting Cell and a gallery devoted to the history of the nearby former airbase RAF Coltishall.