1981 British motorcycle Grand Prix

The 1981 British motorcycle Grand Prix was the eleventh round of the 1981 Grand Prix motorcycle racing season. It took place on the weekend of 31–2 August 1981 at the Silverstone Circuit.

  1981 British Grand Prix

Race details
Race 11 of 14 races in the 1981 Grand Prix motorcycle racing season
Date	2 August 1981
Official name	Marlboro British Grand Prix[1][2][3]
Location	Silverstone Circuit
Course	Permanent racing facility 4.711 km (2.927 mi)
500 cc
Pole position Rider Graeme Crosby Time 1:30.400 Fastest lap Rider Randy Mamola and Kork Ballington Time 1:31.400 Podium First Jack Middelburg Second Kenny Roberts Third Randy Mamola
350 cc
Pole position Rider Anton Mang Time 1:33.500 Fastest lap Rider Unknown Podium First Anton Mang Second Keith Huewen Third Jean-François Baldé
250 cc
Pole position Rider Anton Mang Time 1:34.900 Fastest lap Rider Unknown Podium First Anton Mang Second Roland Freymond Third Graeme McGregor
125 cc
Pole position Rider Jacques Bolle Time 1:42.510 Fastest lap Rider Unknown Podium First Ángel Nieto Second Jacques Bolle Third Hugo Vignetti
50 cc
Pole position Rider No 50cc race was held Fastest lap Rider No 50cc race was held Podium First No 50cc race was held Second No 50cc race was held Third No 50cc race was held