Just popped up on their Facebook page, don't see it live yet. "New Dutton Epoch SACD & Quadraphonic Releases." However, the quad mixes are all of their own recent recordings - the music is early 20th century British composers.
https://www.duttonvocalion.co.uk/proddetail.php?prod=CDLX7348
https://www.duttonvocalion.co.uk/proddetail.php?prod=CDLX7351
https://www.duttonvocalion.co.uk/proddetail.php?prod=CDLX7353
https://www.duttonvocalion.co.uk/proddetail.php?prod=CDLX7348
https://www.duttonvocalion.co.uk/proddetail.php?prod=CDLX7351
https://www.duttonvocalion.co.uk/proddetail.php?prod=CDLX7353