"Some of the best juniors are more than capable of competing at senior level, but the depth is just not there in the junior ranks, " he said.

BBC: James Huckle set for Commonwealth Games bow

The 20-year-old emigrated with his family from Halifax four years ago and came through the Storm junior ranks.

BBC: Gareth Widdop in Storm squad for World Club Challenge

Riots by unpaid junior soldiers have yet to spread to the middle ranks but may do so.

ECONOMIST: Zimbabwe

Twell is entering her first season in the senior ranks after a 2008 that saw her become world junior 1500m champion.

BBC: 'New Paula' targets gold in 2012