Eyes Wide Shut

A complete shot in the dark, but browsing the soundtrack listing on IMDb, I would hazard a guess that it is:

Performed by Jocelyn Pook and the Jocelyn Pook Ensemble with Manickam Yogeswaran
Courtesy of Virgin Records Ltd
Written by Jocelyn Pook and Harvey Brough
Published by Chester Music Ltd and Hubba Dots Ltd

I could be completely wrong, of course..........!