Elinor Barker and Joe Kelly on GB track team
Elinor Barker wins junior women's time trial, Road World Champs 2012
Junior time trial world champion Elinor Barker replaces Joanna Rowsell in Britain's line-up for the Glasgow round of the UCI Track World Cup this weekend.
Joe Kelly has also been drafted in to replace Steven Burke in the men's endurance line-up.
"It's a fantastic opportunity for these two youngsters to step in and experience the GB competition environment at an elite level," said GB performance director David Brailsford.
No reasons were given in British Cycling's statement for Rowsell and Burke's non participation.
The Glasgow round of the 2012-13 UCI Track World Cup takes place from Friday November 16 to Sunday November 18. The event will host Olympic team pursuit gold medallist Ed Clancy's debut in the team sprint alongside Philip Hindes and Jason Kenny.
Cycling Weekly will be covering the Track World Cup with daily online updates.
Great Britain's revised team for the Glasgow Track World Cup
Clancy joins sprinters for Glasgow World Cup