And we owe a debt to Carnival – as the filming opportunity they gave us was on turnaround day, when hundreds of Iona’s passengers with hundreds and hundreds of pieces of luggage disembark… and hundreds more embark, ditto. With the ship towering over you, and travellers streaming past in both directions, it feels like something of a miracle each time: the companionways packed with indomitably cheerful crew members and luggage trolleys up and down throughout the day. In the middle of all that we traversed the ship, filmed interview after interview and watched cadets at work. Somehow it all got done in a morning – with a lot of walking; thankfully guided throughout. Without that we surely have got well and truly lost, and maybe found ourselves on an unbooked cruise, or at least held up departure until we were found…