Quite possibly something like this.
How much of that could you understand? Frankly, I found him a bit hard to listen to, but after I decoded his speech somewhat, I could understand him a lot better. I got 91% intelligibility in the first half of the recording, which might be about 300 words.
That is a modern Bristol accent from 1932. Honestly, I found him rather hard to understand. If you listen to it in bits and pieces you understand it better than if you listen to one long flow. Also some words that you don’t understand the first time you get the second time.
