On May 1, 1994 - 25 years ago today - the world was shocked by the death of three-time world champion Ayrton Senna when he crashed while leading the San Marino Grand Prix at the Imola track in Italy. Declan Colley recalls one of Formula 1's darkest days.

FORMULA ONE team Williams said last night it was surprised by the Italian Supreme Court’s decision that will see technical director Patrick Head and former chief designer Adrian Newey again face charges over the death of Ayrton Senna.

The future of the Italian and San Marino Grands Prix were under threat today after Williams technical director Patrick Head and former chief designer Adrian Newey were told they will have to return to court to face charges relating to the death of Ayrton Senna.