The Scottish actor Brian Cox has revealed he will not be adopting the more famous vocal mannerisms of Winston Churchill in his next major movie.

Cox is portraying Churchill in the film of the same name, to be released in June to coincide with the 73rd anniversary of the D-Day landings in Normandy.

Cox said the normal speaking voice of Churchill, which he has studied from private recordings, was very different from the tones he used in his famous and often rousing speeches.

Cox said: "The problem with Churchill is that you always fall into this trap of 'the Churchillian voice".

"I kind of discovered that the Churchillian voice was very much part of his oratory style - something he created.

"So there's a bit where I do 'my Churchill'...but for most of the film, I really don't talk like that because he was very quick and much more mercurial in his language."

Churchill, the movie, was shot in Scotland, and also features Miranda Richardson as Churchill's wife Clementine.

The film portrays the days leading up to D-Day in the summer of 1944.

He added: "Clemmie was his rock.

"She keeps him on the straight and narrow, but is also quite exhausted by him and by his mood swings.

"I think he's full of flaws and someone who lives with his mistakes, and that was a great source of his depression.

"There was an element of loneliness...he was alone for so much of the time because he was always against the flow.

"When Neville Chamberlain came back from Munich with his little piece of paper - peace in our time - Churchill didn't buy it for a minute.

"People's didn't like him because he stated what he believed."

Churchill has been notably played on screen several times, including Albert Finney in The Gathering Storm, Robert Hardy in The Wilderness Years and Richard Burton, and recent depictions by Michael Gambon and John Lithgow.

Finney's much praised depiction, in 2002, won him a Bafta and an Emmy.

Cox said he has gained weight to play the role.

"You have to have the weight," he said.

"He was not a tall man, but he was big.

"You can't be walking around in padding. His walk is very easy: there's a sort of shuffle about him."

Cox added: "Churchill wasn't like the bunch of chancers we've got now, who are not a patch on him.

"Boris Johnson can bleat all his likes, but he ain't no Winston Churchill."