The 2008 Speedway Grand Prix of Great Britain, known as the 2008 FIM Meridian Lifts British Speedway Grand Prix for sponsorship reasons, was the fifth race of the 2008 Speedway Grand Prix season. It took place on 28 June, in the Millennium Stadium in Cardiff, Wales, United Kingdom. The British Grand Prix is one of the four Super Prix events held in 2008. The winner in Cardiff will progress to the Super Prix final, taking gate 3 and the white helmet colour.

Leigh Scott Adams is a former motorcycle speedway rider from Australia. He is a multiple Speedway Grand Prix winner and World Team Champion. He also won a record 10 Australian Solo Championships, four Australian Under-21 Championships, the 1992 Individual Speedway Junior World Championship, and was the 1986 Australian Under-16 Champion.