As a 14-year-old, she picked up a spade and joined with the rest of wartime Britain in the Dig for Victory campaign. Seven decades later, though no longer wielding the spade herself, the Queen, 83, has again embraced the "grow your own" movement. For the first time since the war, fruit and vegetables are to be found in an allotment-sized plot in the gardens of Buckingham Palace. Called the Yard Bed, Buckingham Palace's 4x10 metre plot is in a challenging, north-facing area to the garden's rea