Idowu will be defending the World Indoor title he won in Valencia two years ago while Ennis will look for a return to the podium in the pentathlon.

Also named were sprint duo Dwain Chambers and Harry Aikines-Aryeetey, who set the standard for British 60 metres sprinting with their blistering dash at the recent Aviva World Indoor trials and UK Championships.

Chambers, the silver medallist in Valencia in 2008, set the fastest time in the world this year with a time of 6.50sec and Aikines-Aryeetey close behind with 6.55.

British record holders Jenny Meadows and Kate Dennison, who set new 800m and pole vault national records respectively at the Aviva Grand Prix in Birmingham last Saturday, are also included in the squad.

A number of up-and-coming endurance athletes enter into the team including Vicky Griffiths, Ed Aston and Andrew Osagie in the 800m, Charlotte Best in the 1500m and 3000m athletes Scott Overall and Gemma Turtle.

Also returning to indoor action are Richard Buck and Dale Garland in the 400m and 4 x 400m relay alongside World Championship 4 x 400m silver medallist Conrad Williams.

Helen Clitheroe who has found a new lease of life in the 1500m and the evergreen Joice Maduaka who won her sixth indoor 60m title in Sheffield, are also included.

UK Athletics Head Coach Charles van Commenee said: "This competition gives athletes an opportunity to gain championship experience on a global level, the endurance athletes especially have taken this chance with lots of new faces in those disciplines.

"The team is slightly bigger than I would have anticipated at the start of the winter season which positively shows the depth of the pool of athletes we have.

"We have names which will make the podium if they perform to potential and there is always room for outsiders."