Rowsell and Burke pull out
Olympic champions Joanna Rowsell and Steven Burke have withdrawn from the Great Britain team for this weekend's Track World Cup in Glasgow.
Rowsell was recently laid low with a virus and her absence breaks up her world and Olympic-winning combination with Laura Trott and Dani King. The trio had set six successive world records.
Elinor Barker, the world junior road time-trial champion and European junior individual pursuit champion, is an able deputy at the Sir Chris Hoy Velodrome, with competition taking place from Friday to Sunday.
Burke's absence from the men's team pursuit squad means none of the four-man team which won Olympic gold in London will be riding in Glasgow, with Joe Kelly joining a youthful squad.
British Cycling performance director Dave Brailsford said: "It's a fantastic opportunity for these two youngsters to step in and experience the GB competition environment at an elite level."
Ed Clancy won 4,000 metres team pursuit gold in London, successfully defending the title claimed in Beijing.
But the 27-year-old Yorkshireman will now revert to the three-man, three-lap team sprint, which takes place on Friday's opening day of competition.
Clancy will fill the man three spot occupied by Sir Chris Hoy as the Scot combined with Philip Hindes and Jason Kenny to win gold in London.
Clancy told www.britishcycling.org.uk: "We are going into the unknown but what is the worst that could happen? I get dropped and ride for three laps on my own, I'll never do team sprint again and go back to the team pursuit.
"As much as I'd like to stay on there and do a good last lap and open up another doorway, another option for someone to look at in the future, I wasn't a team sprinter before this little journey, there's no worst case scenarios really.
"It's going to be quite interesting to see whether I can match those boys for acceleration when they get going."
Clancy won omnium bronze in London, the individual medal sealed with an impressive performance in the final discipline, the one-kilometre time-trial.
His time of one minute 00.981 seconds would have placed him third in the Olympics in Athens, when Hoy won before the event was removed from the Games, and would have been fast enough to win the world titles from 2004 to 2008, three of which were won by Hoy.
If the team sprint is a success Clancy will look to ride it again at February's Track Cycling World Championships in Minsk, Belarus, along with the 1km time-trial.
He added: "Plan A is that the team sprint will go well in Glasgow and hopefully I'll ride the team sprint at the worlds as well as the kilo just as a little sort of side project; a bit of a break from the team pursuit.
"I've nothing against it, I love riding team pursuit but sometimes a change is as good as a break, that's the idea behind it."