…31. In the explanatory memorandum to its original proposal for a regulation, the Commission noted, at point 20, that ‘[c]ancellation by an operator … represents a refusal to supply the service for which it has contracted, except in exceptional circumstances beyond its responsibility, such as political instability, severe weather conditions, inadequate security and unexpected safety failures. For the passenger, cancellation in ordinary circumstances, for commercial reasons, causes unacceptable trouble and delay, particularly when not warned in advance.’ At point 23, it stated: ‘Although passengers suffer similar inconvenience and frustration from delays as from denied boarding or cancellation, there is a difference in that an operator is responsible for denied boarding and cancellation (unless for reasons beyond its responsibility) but not always for delays …32. It is not all that easy to discern the logic behind the distinction that the Commission was there drawing ……35. In the course of the legislative process, however, there does not appear to have been a strong focus on that distinction, particularly once the levels of compensation had been reduced. In the text as finally adopted, it is difficult to deduce the criteria for distinguishing between ‘cancellation’ and ‘delay’….38. The Regulation has the considerable merit of granting automatic compensation to passengers whose flights have been cancelled. However, as the Polish Government notes in its written observations, the distinction the Regulation introduces between cancellation and delay may lead to passengers who find themselves in objectively similar situations being treated differently….47. In the IATA and ELFAA judgment, the Court stated unequivocally that the objective of Articles 5 (cancellation) and 6 (delay) of the Regulation is apparent from the first and second recitals in the preamble, according to which action by the Community in the field of air transport should aim, inter alia, at ensuring a high level of protection for passengers and should take account of the requirements of consumer protection in general, inasmuch as cancellation of, or long delay to, flights causes serious inconvenience to passengers….51. However, regardless of the seriousness of the inconvenience caused, the Regulation provides that the cancellation of a flight automatically triggers a right to compensation (under Article 7) while a delay never does. As the order for reference in Sturgeon suggests and as the Commission indicated at the hearing, the Regulation therefore appears to be based on the assumption that a cancellation necessarily causes more inconvenience to passengers, and hence merits a stronger form of protection, than a ‘mere’ delay. 52. It is wholly unclear to me why this should be so ……60. It seems to me that the underlying logic (again, against the background of enhanced consumer protection) must have been that, where the operator is not responsible for the inconvenience (whether caused by cancellation or long delay), he should not have to pay compensation; and that, conversely, where he is responsible, he should pay. Put another way, the criterion for compensation is not causation, but fault (broadly defined) on the part of the operator. 61. If that is right, it still does not explain why passengers suffering the inconvenience of a cancellation and passengers suffering the inconvenience of a long delay are treated differently. …62. The difference in treatment therefore appears to fall foul of the principle of equal treatment….68. Factors that have been cited before the Court and in national case-law and legal writing as providing possible indications that a flight has been cancelled include: change of air carrier, change of aircraft, change of flight number, change of airport of departure or arrival, giving baggage back to passengers, new check-in for passengers, new seating assignment, allocation of all passengers to one or more other aircrafts, issuing new boarding passes, and the fact that the flight is described as ‘cancelled’ by the pilot (or other air carrier staff) or on the departures board. 69. Common sense suggests that all of these factors could be indications that a flight has been cancelled rather than merely delayed. The more factors that are present together, the more likely it becomes that there has indeed been a cancellation. By the same token, I do not think that any individual factor can be conclusive….72. The Commission, supported at the hearing by counsel for Mr Böck and Ms Lepuschitz, for Condor, and for the Greek Government, suggests in its written observations that a change of flight number is a strong indication that a flight has been cancelled. I agree….75. Since none of the factors cited can be conclusive on its own, national courts must assess the importance of each of them, when they are present in combination, in each individual case. That may lead to significant problems with legal certainty….81. As a matter of common sense, time is obviously a factor in identifying whether a flight has been cancelled. If a number of the factors listed above are present in combination and/or the flight has been delayed for an inordinate period of time, that is a very strong indication that the flight has in fact been cancelled….83. … However, there are two difficulties with this approach. First, what is meant by ‘inordinate delay’? Second, is it permissible to interpret the Regulation in a way that classifies inordinate delay as de facto cancellation?…87. It seems to me impossible to identify, with any acceptable degree of precision, exactly what period of time must elapse before a delay become ‘inordinate’.88. It would therefore be a matter for the national court, in each individual case, to evaluate the facts and reach a view – based on some mixture of national legal tradition, good sense and instinct rather than any precise Community legal norm – as to whether the delay in that instance had been ‘inordinate’ and should therefore be regarded as a de facto cancellation. ……96. It seems to me that, in seeking to avoid Scylla (obvious discrimination against passengers whose flights are inordinately delayed when compared to passengers who obtain automatic compensation for their cancelled flight), one is immediately swept into Charybdis (legal uncertainty). …