David Jefferies

Jefferies died on Thursday, May 29, 2003, during practice week for the 2003 Isle of Man TT. The turn at Crosby is a shallow left-hand turn taken at speeds of around 160 mph; on the outside of the turn there are stone walls at the front of gardens. Jefferies approached the turn on his TAS Racing GSX-R1000, following a lap of 125 mph average speed (the fastest in that practice week). Jefferies reportedly hit the wall of number 29 Woodlea Villas bordering the turn before he and his machine were hurled back across the circuit, taking lumps of debris across the road and bringing down a telephone pole in the process. Jefferies was killed instantly upon impact with the wall. In the aftermath of the crash, fellow rider Jim Moodie did not have enough time to brake when he reached the scene and rode into the telegraph lines which were hanging across the road due to the incident;three of the lines snapped; however, one came over his motorcycle's windscreen and nearly killed him when it wrapped round his throat; it snapped at the last minute and Moodie escaped with his life; however, he retired from TT competition shortly afterwards. A friend and fellow TT competitor, John McGuinness, who was the first rider to reach the scene, described it as looking 'Like a war zone'.

Jefferies specialized in street circuits, such as the Isle of Man TT and the North West 200, where he was a four-time winner. At the Isle of Man TT, Jefferies was the first rider to lap in excess of 125 miles per hour (201 km/h) and the first to win three races during the week-long festival for three consecutive years. He also set the absolute lap record for the Isle of Man TT course during the 2002 Senior TT at 17min 47sec, an average speed of 127.29 miles per hour (204.85 km/h).

Jefferies competed in a range of racing classes including the Grand Prix world championship in 1993, and the World Superbike Championship in 1993 and 1995. He was the British Superstock 1000 champion twice in the previous three years.

Allan David Jefferies (18 September 1972 – 29 May 2003) was an English professional motorcycle racer. He died after crashing during practice for the 2003 Isle of Man TT races.

The son of Tony Jefferies, also a former Isle of Man TT winner in 1971, David Jefferies was born in Shipley, West Yorkshire, England. His uncle was fellow TT winner Nick Jefferies. Jefferies attended Salt Grammar School.