The red poppy is the ubiquitous symbol of remembrance throughout the UK and much of the Commonwealth.Its counterpart in France is another wild flower that was found in Flanders Fields - the blue cornflower or the Bleuet de France. 

Since 1933 there has also been a White Poppy sold by the Peace Pledge Union, which is seen as an alternative by anti-war activists.

BBC Radio 4, Poppies Are Red, Cornflowers Are Blue