GLAMORGAN'S interest in the Twenty20 Cup all but disappeared at Edgbaston last night as they lost their last six wickets for 13 runs in twenty balls to turn a winning position into a spectacular four-runs defeat.

Pacemen Neil Carter and Dougie Brown engineered their amazing collapse with five wickets between them and now they must hope to salvage some pride against group leaders Northamptonshire at Sophia Gardens this evening (7pm).

Coach John Derrick said after last night's debacle: " It was pleasing that a few players got thirties and fourties but when they got out it put pressure on the younger players lower down.

"When we needed to push it around we went for big shots. They held their nerve and we didn't."

After blowing up in a chase for 206 against Warwickshire at Swansea last Saturday, Glamorgan were poised to overhaul the home side's 169-9 with only 24 needed from the last four overs with seven wickets left.

Yet Brown transformed the game when David Hemp (40 from 19 balls, four sixes) and Jonathan Hughes (first ball) gave leg-side catches in the same over.

Carter (3-17) landed another double blow, removing Mark Wallace and David Harrison in the next over, and Brown (3-21) trapped Andrew Davies lbw to claim the fifth wicket in 13 balls.

Glamorgan wanted 11 from the last over but with Michael Powell run out for 24, they closed on 165-9 - a big comedown after a second-wicket stand of 80 by Matthew Elliott (41) and Sourav Ganguly (33).

Warwickshire had been given impetus by Jim Troughton's first Twenty20 Cup half-century after sketchy progress to 65-4 and a miserly spell by David Harrison (2-17).

Ganguly struck with his first ball by bowling Jonathan Trott and finished with a fine 3-27 but Troughton and Loudon added 54 in five overs in a costly period for Glamorgan's spinners.

Troughton reached 51 from 55 balls with five fours and two sixes before top-edging Ganguly to Davies and Brown smashed two sixes in a dash to 23 from 11 balls.