GLAMORGAN are right in the mix for the knockout stages of the Yorkshire Bank 40 after last man Simon Jones helped them to a dramatic win against Somerset in Cardiff.

The former England fast bowler struck a four in the final over to beat the Group C leaders Somerset by one wicket at the Swalec Stadium.

It was a win that lifts Glamorgan to second on run rate, two points back on the pace setters with a pair of games in hand.

Matthew Mott's side have four games left and little margin for error with Somerset, Gloucestershire, Middlesex and Leicestershire all in the mix for top spot.

They did things the hard way last night, making a meal of what looked like being a simple victory charge when they were well set on 195 for four in the 33rd over, chasing 223 to win.

But the loss of captain Marcus North, after a partnership of 42 with Goodwin, sparked a collapse with the wickets of Ben Wright, Goodwin, Dean Cosker and Graham Wagg.

Five wickets fell in the space of 25 balls as Glamorgan sank from 195 for four to 215 for nine. It left Glamorgan needing eight from the final three overs.

With the scores level going into the final over Jones struck the winning runs with three balls remaining.

Wicketkeeper Mark Wallace cracked 70 from 57 balls and Chris Cooke (44) which laid down the foundations of the win.

Somerset had been indebted to England one-day star Jos Buttler (67 from 49 balls) and Nick Compton (50), who had shared in a 116 partnership for the fifth wicket in 18 overs after their side had slipped to 64 for four.

Somerset lost out-of-form captain Marcus Trescothick, who had his off stump pinned back by to the fourth ball of the match by Michael Hogan.

Hogan struck again to remove the in-form Craig Kieswetter, who had scored an unbeaten 126 in his county's YB40 win over Gloucestershire the day before.

Kieswetter had looked to get in his stride with a drive for four but in trying to repeat the shot he was caught at cover leaving Somerset 19 for two.

The visitors, mainly thanks to Peter Trego, reached 50 in the 14th over before Jones bowled former Glamorgan captain Alviro Petersen.

Somerset suffered a major setback when Trego - 42 from 50 balls - holed out to Hogan on the long-off boundary to leave the group leaders 64 for four in the 16th over.

But England pair Buttler and Compton gradually got the visitors back into the contest with their partnership. Buttler was particularly effective planting Jim Allenby for six over long-on to bring up the Somerset 100 in the 26th over.

Somerset took the batting powerplay in the 32nd over and proceeded to take 54 off the four overs with Buttler - 50 from 39 balls - hitting a six and two fours off an over from Hogan.

Compton, who went to his half-century from 74 balls, perished to the last ball of the powerplay when he was bowled by a Hogan full toss, and Buttler's impressive contribution ended when he went leg before wicket to Jones.