I won't say a lot about this, or about Humphrey Searle - just that when I hear pieces like this it strikes me that posterity is often kinder to art than to music. True, many paintings are left for years stacked in attics, facing the wall, but all a painting needs is a wall to be hung on. Some people might glance at it. A few might meditate upon it. Of them, only a few people might get anything out of it and many people might detest it. Whatever the response, the artist felt he or she had something that needed to be expressed - and expressed it. There it is, so long as someone provides the wall-space for it.
Music, on the other hand, needs people to perform it, needs people to have enough confidence in it to want to perform it. Unperformed, it exists merely as dots on a page, silent, in the dark. Recording technology has brought the condition of music a step closer to that of painting but it still requires musicians to record the music and listeners to click on it. Music sleeps until it is woken up.
Humphrey Searle wrote five symphonies, not to mention music for a lost episode of Dr Who and the 1963 film, The Haunting. He was also a great cat-lover.