R101 Despite the lack of full endurance and speed trials and the fact that a proper investigation of the aerodynamic consequences of the extension had not been fully completed by the N.P.L., a Certificate of Airworthiness was issued on 2 October, the Inspectorate expressing their complete satisfaction with the condition of the R101 and the standards to which the remedial work had been carried out. The actual certificate was handed over to H. C. Irwin, the ship's captain, only on the day of her flight to India. R101 departed from Cardington on the evening of 4 October 1930 for its intended
R101 at over northern France, with conditions improving over southern France and the Mediterranean Sea. Although the mid-day forecast indicated some deterioration in the situation, this was not considered to be alarming enough to cancel the planned voyage. A course was planned which would take R101 over London, Paris and Toulouse, crossing the French coast near Narbonne. Fine rain was beginning to fall when, at dusk, with all the crew and passengers aboard, the R101 readied for departure. Under the illuminating spotlights, the jettisoning of water ballast to bring the airship into trim was clearly visible. Squadron Leader Booth, the commander