Playing fields vie for award
The dozen entries will be put to a public vote, allowing city residents to chose one area of greenspace for entry into the competition to mark the Queen's diamond jubilee.
Prince William, who is patron of the campaign, said: "The year 2012 marks the Queen's diamond jubilee and I cannot think of a more fitting tribute to my grandmother's 60 glorious years on the throne than to dedicate to the Queen this programme that will save playing fields for future generations.
"The sad truth is that, over the years, thousands of playing fields have been lost to development, and many more are under threat today".