Bart,
This Dutch site
http://www.bhummel.dds.nl/gif/souburg.html#her follows the story as in your replies.
Yet, is there one aircraft missing? 23 a/c left Souburg, minus 1 that flew to Rozenburg/Rotterdam, 2 c/l Ostend, 1 left at Calais = 19 that left for Chartres next day, minus 1 crashed on take-off (Van Hulzen+Sitters, KIFA) = 18.
It says in above site that 17 a/c reached Cherbourg. Where's the missing one?
How to interpret too that on the second day one group commander "lost four aircraft" and reached Caen with "the other three"? It seems that the "lost four" must have reached some airfield after all after the fog had cleared, otherwise the math doesn't add up.
Groet,
Leendert