It would definitely be KLM Cityhopper, main line KLM do not fly to HUY. With less than a dozen and a half ex Air UK/KLM UK Captains left in KLM Cityhopper, and one or two now on a Dutch contract, I think the odds are in favour of the Captain being one of the hundreds of Dutch nationality.
There are no Health and Safety regulations precluding this sort of thing in Cityhopper and I doubt if there were, any pilot, Dutch or British, would take any notice of them.