Adrian Boult was a hugely important British conductor, and has a vast discography running from 1920 to 1978. He began recording acoustically for the Gramophone Company, followed by Edison Bell, then electrically for Vocalion, before extensive associations with EMI, Decca and Lyrita.

Mendelssohn – A Midsummer Night’s Dream – Nocturne
BBC Symphony Orchestra, Adrian Boult
Aubrey Brain, horn

His Master’s Voice DA 1318
Matrices 0B 4168-II, 4169-I (30-10615/6)
Recorded 6th April 1933

Elgar - Imperial March Op.32
BBC Symphony Orchestra, Adrian Boult

Mediafire link for Holst - Planets - excerpts - Macmillan

(This is a zip file – left click the link, download the file, then unzip when downloaded)

Victor album DM929, 11-8303/6 (auto-coupling)
(Standard coupling on 11-84121/5)
Matrix 2EA-1054-1A
Recorded 16th April 1937

This was used as a filler side for the Victor set of Ernest Macmillan’s recording of four movements from Holst’s The Planets