Chaps...
Yes, I get that, just that normally I think the Loganair/Suckling Dornier 328 based at NWI does three roundtrips to Manchester each day with a round-trip to Exeter in between the first and second trip. It sounds very much like the Den Helder route will go in this 'gap', allowing also a through-service from Manchester to Den Helder which kinda gives the impression the NWI-EXT route is for the chop..