Pop singers and musicians including One Direction, Bono and Ellie Goulding have joined forces to record a charity song to raise funds to ease Africa's Ebola crisis.

The recording is a new version of the Band Aid charity single "Do They Know It's Christmas?" which was first recorded 30 years ago to raise funds for famine relief in Ethiopia.

Organizer Bob Geldof said One Direction sang the opening line of the new record, and other stars taking part in the London recording on Saturday included Rita Ora and Ed Sheeran.

The full lineup also features Coldplay's Chris Martin, Sinead O'Connor and Emeli Sande.

Geldof said the British government has agreed to waive tax on the single — which means all the money raised by the song will go to charity.