Since you are interested in Elgar: Cello Concerto / etc, here is a list of other items that you may find interesting.
LUDWIG van BEETHOVEN
Beethoven: The Violin Sonatas
Bella Hristova (violin), Michael Houstoun (piano)
[ Rattle Records / 4 CD - released 26/Apr/2019 ]
The complete Beethoven violin sonatas, 33 wonderful pieces of music, performed by two of the greatest Beethoven interpreters working today. Over 4 hours of beautifully produced, expertly performed Beethoven in a handsome 4-CD hard-cover...
Sheku Kanneh-Mason (cello) / City of Birmingham Symphony Orchestra, Mirga Gražinytė-Tyla
[ Decca Records / CD - released 1/Jun/2018 ]
"A most rewarding CD then, sure evidence that we should henceforth be on the lookout for any performances, recorded or live, that involve Sheku Kanneh-Mason." - Gramophone
BOCCERHINI / DVORAK / TCHAIKOVSKY / VIVALDI / etc
Slava! The Art of Rostropovich (3CD)
Mstislav Rostropovich (cello) with various orchestras & conductors
[ Deutsche Grammophon / 3 CD Box Set - released 20/Mar/2017 ]
"the intensity of lyrical feeling and the spontaneity of the partnership between Karajan and Rostropovich ensures the position of their disc at the top of recommendations for this peer among nineteenth century cello concertos." Penguin Guide
Sally Maer, Li-Wei Qin, Catherine Jones, Umberto Clerici (cellos) / Various orchestras
[ ABC Classics / 2 CD - released 1/Aug/2018 ]
For over 20 years, the 'Swoon' segment on ABC Classic FM's Breakfast show has been a beloved oasis of calm and beauty, a chance to shut out the noise and busyness of everyday life, and drink in the loveliness of pure music. The first CD compilation...