Very worth watching. It might be online somewhere. It was on VHS and then a DVD was available but it was expensive. “Boom” reminds me a bit of the Dirk Bogarde movie “Modesty Blaise” in that they both take place on a very small island and both movies are visually stunning.
That is Noel Coward in the first photo you showed above. He was in the movie a lot.
MATTHEW'S ISLAND 
Fantastic Elizabeth Taylor movie! I don’t think it is available online, last time I checked. https://en.wikipedia.org/wiki/Boom!_(film)
Never heard of it. I thought it was just a costume/outfit for a fancy party, not a movie. Now I want to see it!
Very worth watching. It might be online somewhere. It was on VHS and then a DVD was available but it was expensive. “Boom” reminds me a bit of the Dirk Bogarde movie “Modesty Blaise” in that they both take place on a very small island and both movies are visually stunning.
That is Noel Coward in the first photo you showed above. He was in the movie a lot.
I did know that was Noel Coward, but I’ve never seen either movie you mentioned. I will hunt them down sometime!