For the filming of scenes from Transformers: The Last Knight, Michael Bay's fifth installment in the robot smashing franchise, Blenheim Palace the 18th Century mansion where the beloved British Second World War leader was born was covered in Nazi regalia.

Huge swastika flags were draped in front of the palace, which has been designated a world heritage site by the United Nations since 1987.

Veterans were outraged at the decision of the board of trustees who run the estate to allow the filming of scenes featuring Nazi symbols at such an historic venue.

"I know its a film, but it's symbolically disrespectful to Churchill," Colonel Richard Kemp, a former commander of British forces in Afghanistan told U.K. newspaper The Sun. "He will be turning in his grave."

Tony Hayes, the founder of Veterans' Association UK, an advocacy organisation for former soldiers, said he thought the former Prime Minister would be "appalled" by the sight of the Nazi symbols.

As well as the huge swastika banners, wartime German military vehicles and provisions were also used on the film shoot, including a Panzer tank, an anti-aircraft gun, Mercedes staff cars and ammunition boxes stamped with the Nazis' eagle emblem.

According to editors at The Sun, the Transformers filmmakers have reportedly paid around $12,980 (£10,000) per day for using the house and grounds.

It is not known exactly why the Nazis feature in the plot of the new Transformers film, which stars Mark Wahlberg, Sir Anthony Hopkins, Stanley Tucci, Josh Duhamel and Isabella Moner.

As well as Nazis, mythical British monarch King Arthur is set to feature in the film, with Autobot robot leader Optimus Prime reportedly set to embark on a quest for King Arthur's sword Excalibur.

Transformers: The Last Knight will hit cinemas next June (17).