I have had the poster quite a while Ted, and have posted it on here asking for the same info. No one seems to know anything about it other than what I've told them. And quite a few have researched it for me, and Have drew a blank...
It's a Quad from Loonies on Broadway, or Zombies on broadway in the U.S. It was submitted to the BBFC in Oct 1948 as Zombies, but was refused on the Zombie title, so was re-submitted in the December of 1948 with the Loonies title and was passed as an "A"cert.
Can't find the pics on my laptop, must be on the other computer, I'll go look and post them shortly...