|Bob Willis Trophy, Cooper Associates County Ground, Taunton (day four):|
|Somerset 296 and 290-8 dec: Abell 119, Green 54; Bull 3-112|
|Glamorgan 131 and 166: Cooke 82; J Overton 5-48|
|Somerset (21pts) beat Glamorgan (3 pts) by 289 runs|
Somerset raced to an impressive 289-run win over Glamorgan early on the final day as they dismissed the visitors for 166 in a little over an hour.
Jamie Overton finished off any Glamorgan hope of survival with a five-wicket haul to match his brother Craig's first-innings effort.
The brothers claimed 14 wickets between them in the match, imposing relentless pressure.
Captain Chris Cooke top-scored for Glamorgan with 82.
But despite Glamorgan's lower order attempting to survive, the last five wickets fell for just 40 runs in 70 minutes on day four as the bowlers got impressive bounce from the River End.
Somerset hope for Tom Banton and Lewis Gregory to return from England duty when they travel to Northamptonshire for round two, starting on Saturday 8 August, while Glamorgan will visit Worcestershire.
Somerset paceman Jamie Overton, told BBC Radio Somerset:
"It's not my last game here quite yet (Overton will join Surrey), we're playing it game by game but I'm thinking that I'm staying until the end of the year.
"I'll give it all my effort until the end of the year, I always give 100% whatever I do.
"It's probably the best we've bowled together (with brother Craig) since a Minor Counties game with Devon, the first time we've done that for Somerset.
"We've always played together so next year is going to be very strange playing against each other, playing for England would be a dream come true and if we can do it together, that would be amazing."
Glamorgan coach Matthew Maynard told BBC Sport Wales:
"We gave away a couple of soft wickets yesterday but the skipper led brilliantly by example, he asked for a bit of resolve and the guys did try their best today.
"But the way Jamie (Overton) used the crease was excellent, he got the ball swinging and got a fully-deserved five-for.
"It's about learning, raising our standards and being capable of handling it.
"It's different (playing under health restrictions), you want to shake hands at the end and there's none of that, separate dressing rooms (in different pavilions), it takes a bit of getting used to but it's far better that we're working under these circumstances than not playing at all."