Ah, I see, yes. Thanks for clarifying that for me.
Terribly unfair, of course, if Warner\Chappell do indeed own the former Keith Prowse rights in the US, to let it go out of print. I know for a fact that this is a highly sought-after work, and surely it is their duty to keep fine works like this in the repertoire? I'd imagine, then, that they own the rights to the Severn Suite too.
This is, perhaps, one of the benefits of shorter copyright-terms (such as we have here in the EU) - publishers who fail to keep works in print no longer have sole possession of those works after a reasonable length of time, therefore making them available for study and performance once more.