Ricky Schouten ran the NL tape label Finger in the Dike, which put out the Hembrug cassette comp. Rob Van Wijngaarden compiled the tape from recordings of his projects and of friend’s projects.
I do not know for certain what their involvment with the place Hembrug was. If there was any trespassing to be done, or photos from a distance, then these men might have done it. Or perhaps Mr.Sluik, someone who at least takes photos of “places” now.