The home side had already lost star striker Kenwyne Jones of Sunderland to a knee ligament injury when they fell behind after 12 minutes.
Downing sent Bridge clear down the left and he picked out Barry, who steered the ball past Ince with his left foot from inside the area.
The second came four minutes later with Middlesbrough's Downing sending Defoe clean through on goal and he kept his head to tuck home his first goal for England since September 2006.
It looked like England could threaten a cricket score on the Caribbean island but the Soca Warriors enjoyed their best spell of the game.
They caused some nervous moments at the back, with the pace and skill of Sunderland's Carlos Edwards and the bulk of Southampton striker Stern John making sure this would be no holiday for the England defence.
Beckham was surprised to captain the side
Edwards was involved in their best move of the match, setting up Darryl Roberts after some good work from Khaleem Hyland down the left, but Roberts' shot was easily held by David James.
Defoe and Dean Ashton missed chances to add to the scoreline before the half-time interval signalled the start of a glut of changes.
One of the new additions was Bentley, who took over from England's stand-in skipper David Beckham to set up the third goal.
The Blackburn star sent in a right-wing cross which T&T could not clear and Defoe was handed the simple task of volleying past Ince.
Defoe should have scored his first international hat-trick only to miscue wide but then combined brilliantly with his second-half strike partner Peter Crouch for one of the best passing moves of the game, but the Liverpool striker was denied by a sprawling Ince.
A noisy home crowd of 25,001 got their wish when their favourite Dwight Yorke was handed a 15-minute run out.
He was unable to mark his brief return from international retirement with a goal but it was still smiles all round for the home nation, and for Capello for a job well done.
England's players will now head off on holiday after a long season, although they will wish it was not all over with Euro 2008 kicking off in less than a week.
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