I borrowed Séance on a Wet Afternoon (1964) DVD from the library. No subtitles.
Another DVD I borrowed was The Long Good Friday (1980). Considered as one of the best gangster movies in the UK. No subtitles.
Some of Hitchcock films like Blackmail (1929), The Farmer's Wife (1928) don’t have subtitles.
I can list a lot of films like that.
I know there are some websites that you can download the subtitles. I have a MacBook, and I usually use the DVD player application. When I tried to upload this downloaded subtitles to this DVD player, it never worked. It worked in VLC, but again the subtitles didn’t match the spoken word. It was few seconds delayed in many instances, which was way distracting and defeats the purpose.
In this advanced technology era, we can keep it simple, and the DVD distribution in the UK can follow what the rest of the world is doing.