One commenter on the article at http://www.omroepflevoland.nl/Nieuws/93 ... weg-1-dode suggests it might have been PH-MRB based on a photo of the tail.
Not confirmed, but c/s does seem to match this General Avia F-22B plane.
Airframe has a darker shade of blue (compared with the Tiger Moth) and a part of the registration is visible. It looks like the last letter is a "B"...so that makes the PH-MRB even more plausible.