den sure kalkun: The cache was at N 55° 40.000 E 012° 33.699, on a lamppost.
I won't write about the solution here, since there is at least one "tribute" cache to this one where someone has used the same idea. I don't know if they linked back to this one, but if so it would spoil their cache to reveal everything here. If you want to know how this one worked, you can write a message to me.