Croquet as you've never seen it before www.youtube.com/watch?v=yEpXWIru9cY
Nick Parish adds: The croquet consultant was Eugene Chang, responsible for teaching the girls how to play. He must have felt right at home in that environment, seeing how similar it is to the Hurlingham.
There's a bit more on Blue Peter at www.youtube.com/watch?v=76wLeQDh_ZU It includes interviews with some of the key people involved in making the video, although astonishingly not Eugene. It's coming to something when the croquet consultant is seen as less important than the director of photography.