R101 as the air minister's office: the second flight of Britain's giant airship. Meteorological offices at Cardington; air minister Lord Thomson about to ascend the mooring mast of the R101 by the lift; luggage-loading at the mooring mast head; view of R101 at the mooring mast after dark; a meteorological observer at Cardington releasing a small pilot balloon; telephoning to the control cabin of R101 while beside a wind-measuring instrument.