London-based Palladino (who's worked with Sampha, Jessie Ware, and SBTRKT) has co-written new song "Mystery" with Jai Paul, while Lewisham firefighter Ruthven worked with A.K. Paul on "Evil". Jai's vocals on "Mystery" mark the first time in a long time that he's appeared on an official release.

Both songs will be available for just 24 hours via The Paul Institute's website - their stores close at 6pm on 17 November. A note on the store says that money from each purchase will "help fund the development of new artists at the Institute."

The new music comes shortly after brother Jai and A.K. were pictured with collaborator Muz Azar in a property blog - they've acquired premises for their Paul Institute.

Sign up to the Paul Institute and listen to the songs.