THE National Plate adventure ended in the semi-finals by a very well-drilled Services team from Plymouth.
The first 15 or 20 minutes were dominated by Widnes. Riley and Glover went close but a Whitfield penalty was the only reward.
The Devon side knuckled down and a lineout set-piece gave them a corner-flag try.
The screw was turned in the second period as good handling from their three-quarters clocked up another two touchdowns.
The Wids fought back with strong runs from Webb, Chambers and Loughnane.
But a lineout and trademark driving maul from the visitors provided the clincher.
Defeat but no disgrace as injuries, holidays and commitments elsewhere had meant there were half a dozen absentees.
Jimmy O'Neill's team had progressed further at national level than any in the club's history.
The next mission is at Fleetwood this Sunday when the Colts play Preston Grasshoppers in the Lancashire Cup Final (ko 3pm).