Mush....100% wrong !
In the early 60's, 70's and early 80's, there were no flights to the skiing airports, like Munich, Geneva, Milan, etc, etc. All the ski holiday companies used DanAir, or its equvalents and if you wanted to travel to Europe in the winter months, you had no choice but to use Gatwick. Cardiff and Bristol were small, regional airports back then, and only really came into their own in the summer months.
That situation persisted for years, for winter sun destinations as well. Its only comparatively lately, that Bristol and Cardiff have been offering a full winter service.
I know this because I made that journey every winter for over 20 years. If you wanted to go by public transport,, it was even worse, as you had no choice but to use the train, get to Gatwick late in the evening, and sleep in the airport, ready for your early morning flight to the snow the next morning, another thing I did more times than I care to remember.
I used to take small parties of lads, mostly the Scouts, and keeping them occupied through the long journey and sometimes night was a pain in the A*** !