Fennell's (mono) on Mercury is classic. There's a good one on Reference,
though I seem to remember it is in reduced (original?) instrumentation.
Imogen Holst made a nice recording, but it's hard to get. Former Principal
Trombonist Denis Wick recorded it for Nonesuch, but it's kind of dull.
I've heard good things about the Reynish on Chandos, but don't know it.

Roger Hecht