Medlam, LincolnshireI live in a hamlet named Medlam, north of Boston. Earlier this morning the hamlet was covered by a blanket of dense fog.As I was putting my kettle on, I noticed four bright lights around the top of an aluminium corn silo in the field next to mine. At first I thought nothing of it,just thinking it must have been light rebounding off. Then I noticed that these lights were not actually on the silo, just very close.I watched for a minute and saw four of these lights slowly revolve around the circular silo before they flew off over my neighbors field into the distance quite quickly.I was not able to see these lights in detail, as the fog made them appear blurred, even though I was less than 100 meters away from them.I would say the lights were individually the size of football.((NUFORC Note: Witness elects to remain totally anonymous; provides no contact information. PD))