No DVD but streaming on Netflix

I was looking for movies with James Hayter (looking for "Trio" actually) and found the streaming link (no DVD) for this movie on Netflix. I'm a little surprised at it being found with the James Hayter search as he's fairly far down the credits.

People here have mentioned it being available in Region 2. There doesn't seem to be a Region 1 version available.

Several British movies from the '30s, '40s, and '50s are available on Netflix as streaming only.