20 Jun 1977 G-BAKD PA-34 on a local flight from Elstree unable to lower the nosewheel. After burning off fuel it diverted to Luton to land on the grass. 4 PoB, no injuries, little damage to the aircraft. The photo is from the David Gearing Collection.
There have been many aircraft over the years landing on the grass with the gear up. I remember an Arrow which, I think, had one main wheel stuck up. It eventually landed all up on the grass.