The obvious comparison to remark on is that Foulds might be somewhat like the English Ives - the same time period of course, wildly experimental, lofty spiritual aspirations, far ahead of their time and essentially alone in their exploration of musical language - both were seen as slightly mad for their ideas, but they composed on regardless. But then of course there are many differences too, which are probably too obvious to mention.
This piece is absolutely fantastic - I adore many of his other works, and am currently trying to get hold of the sheet music to his cello concerto - though it's painfully difficult to obtain! It is apparently a very good piece and similar in parts to the wonderful cello sonata. It was played once in the late eightees by Raphael Wallfisch and was broadcast, but unfortunately I don't know of anyone who has kept their recording of this radio performance, and neither does Foulds' current main editor and champion.