Motoring journalist sued after £1.25 million Porsche engine explodes

Former Formula One driver David Piper is suing motoring journalist Mark Hales after his treasured Porsche 917's engine exploded during a track session.

Hales, who is an experienced racing driver and freelance writer, was piloting the rare Porsche around Cadwell Park race circuit in 2009 when the engine of the £1.25 million vintage 917 failed catastrophically.