Opener Mark Cosgrove cracked an entertaining 73 from 65 balls which proved the difference as a relatively inexperienced Glamorgan side rounded off their Pro40 season with their first win, overcoming Lancashire under the Cardiff floodlights.

Glamorgan could only manage 219 all out in 39.1 overs on a good Sophia Gardens pitch, but Lancashire's innings imploded as Chris Ashling, on one-day debut, took two wickets and claimed two run outs, while stand-in skipper Mark Wallace produced three stumpings.

From 129 for four in the 25th over Lancashire were bowled out for 192 in 37.4 overs, losing by 27 runs, with six of their batsmen either run out or stumped.

The real difference in the sides was that Lancashire's collapse was so much more dramatic than Glamorgan's.

After winning the toss the home side breezed to 135 for two in the opening 20 overs but lost five middle-order wickets for just 19 runs, crumbling to 154 for seven in the space of five overs.

The eighth wicket of Dean Cosker and James Harris did navigate Glamorgan to respectability putting on 48 in 10 overs.

Cosgrove, in typical attacking mode, and fellow Australian Jim Allenby put on 52 for the first wicket within the first 10 overs.

But two Kyle Hogg slower balls accounted for Allenby and Will Bragg as Glamorgan began to show their batting frailties.

Cosgrove continued to attack and reached his 50 with a massive straight six off Gary Keedy from 44 balls.

The equally hard hitting Tom Maynard helped Cosgrove take the total to 135 before both batsmen were out in the space of two overs. Maynard was bowled attempting a slog at Gary Keedy while Cosgrove gave an easy catch to mid-wicket.

That began the collapse which saw Ben Wright caught behind, debutant Nick James caught at extra cover and acting captain Mark Wallace was run out in a mix-up with Harris.

Cosker and Harris did their best to make the Glamorgan innings respectable but they were bowled out with five balls to spare.

Like Glamorgan, who were without the likes of skipper Jamie Dalrymple, Robert Croft and Michael Powell, Lancashire made an encouraging start with the openers VVS Laxman and Paul Horton putting on 52 for the first wicket.

But after Horton was trapped in front by David Harrison, Lancashire lost wickets at very regular intervals and then three for nine runs as the later middle order disintegrated.

The key wicket of Laxman was claimed by Ashling, who then ran out Mark Chilton and Glen Chapple in the space of three overs, sandwiched by Gareth Cross being stumped by three yards as panic set in in the Lancashire dressing room.

Stephen Parry was also stumped before Sajid Mahmood was easily run out attempting a single before Gary Keedy was the last man out with 14 balls remaining.