UFO Filmed Over Farm In Wiltshire UK

On March 30,2012 noon I was walking down from Tan Hill towards West Kennet where I saw this bright object at around 600 to 700 meters in the valley below.This object was getting brighter or dimer and was gradually moving around in the field. At the time I only thought this was a farmer wearing white clothe while working.Lighting conditions wore between thin clouds and light fog, and was qua-it