The Air Accidents Investigation Branch (AAIB) are attempting to recover the body found in the wreckage of the light aircraft that carried Emiliano Sala and David Ibbotson.
A search using a remotely operated vehicle (ROV) located the plane on the seabed off Guernsey on Sunday.
"Tragically, in video footage from the ROV, one occupant is visible amidst the wreckage," a statement from AAIB read.
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Following consultation with the families of Cardiff City striker Sala and pilot Ibbotson and police, it has been decided a recovery operation will be carried out.
A spokesperson for AAIB said: "We are attempting to recover the body.