By ALEX BYWATER

Courage: Matthew Rees has called on his Blues to show their spirit
PICTURES: Getty Images

MATTHEW Rees has told his young Cardiff Blues troops to stand up and be counted or face a Glasgow mauling.
The Blues travel to the Scottish capital this afternoon to face a Warriors side desperate to keep the heat on pool leaders Saracens as they chase a spot in the Heineken Champions Cup quarter-finals.
It might be mathematically impossible for the Blues to progress, but Rees insists his side are up for the challenge as he returns to captain John Mulvihill‘s side.
“We&rs...