This meant that Brit could send an aircraft to, say, Cardiff, without having any engineering support there. The pilots would do a Daily before the first rotation of the day.
I did wonder how the likes of Britannia, who had aircraft operating out of maybe a dozen bases around the country, some with just a single aircraft in summertime, managed for crew basing. Did they base crews at the minor points permanently, just for a season, or simply use Hotac for crew from Luton etc. There were likewise other operators who might pick up work for one based aircraft for a summer, then lose it the next year.