After the 1976 TT, the British Grand Prix took over as the UK round of the motorcycle Grand Prix world championship.
The 1976 Isle of Man TT was the final time the event appeared on the FIM Grand Prix calendar. The Mountain Course had become increasingly controversial among leading riders because of its extreme length, high speeds and lack of modern safety features. Several prominent competitors boycotted the TT after safety concerns intensified during the 1970s.
For 1977, the FIM moved the British championship round to England, where the inaugural British motorcycle Grand Prix was held at Silverstone. This made it the first motorcycle Grand Prix staged on the British mainland. The event later moved to Donington Park in 1987 before returning to Silverstone in 2010.
The Manx Grand Prix and Ulster Grand Prix are separate road-racing events, while the North West 200 is a different Northern Irish road race. None replaced the TT as the official British round of the world championship.