I did some quick research found some interesting stuff. I apologize if this was mentioned on any of the other long threads.

Miichelle John sings backup on Holy Mountain and she was a finalist (apparently) on the Voice UK

Here is a video of a performance


Janet Ramus goes by the stage name 'Cookie'.

Georgina McGeough and Una McGeough are identical twins forming the duo 'Song Sung'. They are connected to David Holmes.

Here is an article about a compilation he put together and he produced their great cover of

clashmusic.com/news/david-holmes-hooks-up-with-song-sung

Here's the video of the cover that he produced and released late last year.

vox.

Apparently David Holmes is producing their album so it is interesting he got them to do backing