Formula 1 champion Jackie Stewart wore a helmet bearing the signature of all living Formula 1 champions including Michael Schumacher as he drove one of his title-winning cars for charity at the Bahrain Grand Prix on Sunday.

Michael Schumacher has signed a charity helmet in one of the only public acts he's taken part in since his tragic skiing accident

The seven-time F1 champion, who suffered life-changing injuries in a skiing accident in 2013, was helped by his wife to write his initials.