My arrival at Underdown was very fortunate.  I had previous been looking for the Class O  section at Redscrip.  I found a suitable layby with a track leading down to it in about the right place, but when I arrived to photograh   Class O, the area was a hive of activity with main trial cars entering and leaving on the opposire side of the A30.   Never being one to turn an opportunity down I set to and photographed what was left of the main trial.