Scotland Yard has declined to comment on reports of a mysterious eavesdropping spyplane circling London.
A radar tracking website showed an aircraft orbiting London at 10,000 feet for more than two hours.
The plane had no recognisable callsign but was identified as a twin-engine Cessna F406 with the registration G-BVJT.
The aircraft has been linked in the past to a shadowy fleet of surveillance planes said to be operated by the Metropolitan Police. Reports suggest the planes, costing £3m a year, are used to monitor mobile phone calls.
Social media websites reported the aircraft flying from Farnborough Airport to south London for today's 'mission'.
A Scotland Yard spokesman declined to offer "acknowledgement or comment".
The video below show the plane circling over London at 10am today.
Pictures courtesy of flightradar24.com