The Great Britain national under-21 speedway team is the national under-21 motorcycle speedway team of Great Britain and is controlled by the Auto-Cycle Union.

The team was started in all editions of Under-21 World Cup and was won one silver medal in 2007.

Denmark has produced three Under-21 World Champions: Chris Louis (1990), Joe Screen (1993) and Lee Richardson (1999).

Two riders, Marvyn Cox (1984) and Gary Havelock (1987) was won Individual U-21 European Championship open for riders from all continents.