[bbfan1991]

Underwear supposedly belonging to Queen Elizabeth II has been put up for sale on eBay.

The auction site listing describes the item as a "once in a lifetime opportunity to acquire and own a piece of collectable Royal memorabilia".

The knickers are embroidered with a letter 'E' and an image of a crown. They have a 26-inch waist and are 16 inches long.

The estate of Hungarian Baron Joseph de Bicske Dobronyi is selling the item, and has claimed that it was left on a private aeroplane during the Queen's visit to Chile in 1968.

Buckingham Palace has not confirmed whether the garment, described as an "item that has been previously used", is authentic.

Queen Elizabeth II is celebrating her Diamond Jubilee this year.