BNP bosses used a Polish Spitfire to front a campaign calling for Eastern European immigrants to be barred from Britain.
The party's 2009 European Elections poster shows a nostalgic picture of a Second World War fighter plane under the slogan Battle for Britain.
RAF experts have identified the iconic plane as belonging not to Britons but to a group of Polish pilots instead, reports the Daily Telegraph.
It was actually flown by the RAF's 303 Squadron - made up of Polish airmen rescued from France shortly before Nazi occupation.
BNP party chiefs defended their use of the image and insisted they knew all about the background.
But John Hemming, MP for Yardley, Birmingham, said: "The BNP often get confused and this happens because they haven't done their research. This is just another example of them getting it wrong.
"It's obvious they just picked an image at random and they are really clutching at straws if they say this was deliberate."
Simon Darby, spokesperson for the British National Party, said that the plane was a symbol of the Battle of Britain and represented the economic struggle the country is facing at the moment.
He said: "It's not like the BNP are against Polish people as a nation. We are against Polish people coming over here and undercutting British workers."
The party's 2009 European Elections poster shows a nostalgic picture of a Second World War fighter plane under the slogan Battle for Britain.
RAF experts have identified the iconic plane as belonging not to Britons but to a group of Polish pilots instead, reports the Daily Telegraph.
It was actually flown by the RAF's 303 Squadron - made up of Polish airmen rescued from France shortly before Nazi occupation.
BNP party chiefs defended their use of the image and insisted they knew all about the background.
But John Hemming, MP for Yardley, Birmingham, said: "The BNP often get confused and this happens because they haven't done their research. This is just another example of them getting it wrong.
"It's obvious they just picked an image at random and they are really clutching at straws if they say this was deliberate."
Simon Darby, spokesperson for the British National Party, said that the plane was a symbol of the Battle of Britain and represented the economic struggle the country is facing at the moment.
He said: "It's not like the BNP are against Polish people as a nation. We are against Polish people coming over here and undercutting British workers."
