Chevvron, the daily service was on a repetitive flight plan, so would not have appeared completely "unannounced", unless I've misunderstood the nature (and correct name) for a flight plan that is lodged covering all flights under that plan for a period.
Sotonsean, the Chambery flights were, IIRC, a series of once weekly charters during the ski season, ie about 10 weeks. I'm overwhelmed by the strength of your argument about Shoreham, and agree that it should not be on the list. (I had to endure the bus ride to LGW on several occasions, and I reckon I hold the time record for getting off the aircraft at Shoreham, across the apron and into the gents'. Life was simpler in those days; no jobsworths in hi-vis to get in the way.)
Last edited by old,not bold; 2nd Feb 2023 at 14:54.