A first trophy for Glamorgan since 2004 and a timely success too when there are more questions than ever about the future of the 18-county structure.
They've won it to a large degree thanks to their tenacity with the bat.
Times threatening positions were snuffed out but they kept scrapping and those 33 added by the final pair were very important.
Joyous scenes at Trent Bridge - just what a shame there was only half a crowd thanks to the stupid scheduling.
You feel a little sorry for Glamorgan in that regard.
It's been a cracking days cricket and deserved a showpiece Saturday at Lord's.
Post update
Rex FeaturesCopyright: Rex Features
Glamorgan seam bowler Michael Hogan speaking on Sky Sports:
"I'm a little bit lost for words really - it's an awesome feeling.
"I've worked hard for 17 years for a moment like this, so it's great.
"It was an awesome performance from everyone and so well deserved. We got on a roll in this competition and built some momentum and we've carried that all the way through to this final.
"I'm looking forward to an eventful evening ahead."
Glamorgan win the One-Day Cup
Durham 238 v Glamorgan 296-9
This has been an outstanding defence.
Andrew Salter started things off with the run of wickets outside the powerplay.
They keep the squeeze on, got a bit of luck with the wicket of Cameron Bancroft but didn't allow any other partnerships.
Sean Dickson finishes 84 not out, a valiant effort, but after Bancroft went, no-one else could stay with him.
Glamorgan were on the end of a hammering in their last cup final back in 2013 but they've dished out one of their own here.
Post update
Mike Powell
Ex-Glamorgan batsman on BBC Radio Wales
The fact Michael Hogan took the last wicket speaks volumes - what a performer and servant he has been for this county.
What a day for Glamorgan! They should be very proud of what they've achieved today.
Post update
Nick Webb
BBC Radio Wales
Glamorgan have won a one-day final for the first time in their history.
They're dancing in the stands and on the pitch!
GLAMORGAN BEAT DURHAM BY 58 RUNS
Durham 238 v Glamorgan 296-9
They've done it!
Michael Hogan draws the edge from Chris Rushworth and it's the easiest catch for Tom Cullen that has sealed victory.
What a wonderful moment for Glamorgan and cricket in south Wales.
Video content
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Durham 238-9 9 (Target 297)
Durham need 59 in 30 balls
Glamorgan on the cusp now of their very first knockout trophy.
Surely they cannot be denied now.
WICKET Trevaskis c Selman b Cooke
Need 59 in 30 balls
The rate hits two a ball required for the first time.
Liam Trevaskis takes a ball from outside off to the midwicket fence.
And then another from a straighter line backward of square!
But trying again he can't clear the ropes and is well held by Nick Selman running in from long-on.
Durham 227-8 (Target 297)
Need 70 in 36 balls
What an over!
Two wickets and only the single.
Post update
Nick Webb
BBC Radio Wales
Durham are running out of men as Glamorgan's players gather to urge each other not to lose their cool.
Glamorgan on the verge now.
WICKET Potts c Cullen b Carey 0
Need 70 in 38 balls
Rex FeaturesCopyright: Rex Features
The wicket brings out a new man and we've seen today how hard it's been to get going.
Matty Potts tries to carve a ball to third man and just edges to the wicketkeeper who takes a smart catch diving to his right.
Post update
Jake Ball
Notts and England bowler on BBC Radio 5 Live Sports Extra
Luke Doneathy and Sean Dickson may well have had a chat there before that ball that if he had a go at adding a few boundaries and made sure that Dickson was still there at the end, there's a chance.
I don't mind that shot too much as Doneathy's tried to take some pressure off Dickson.
Terrific catch by Carlson though under lights. It was in the air for a long time!
I disagree Jake. Doneathy was doing a decent job and the stand was building.
Live Reporting
Alex Winter and Adam Williams
All times stated are UK
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Latest PostGoodnight
Glamorgan win the One-Day Cup
Video content
A glory day for Glamorgan.
To borrow Adrian Dale's old phrase - immortality in the Principality.
For this side become the very first Glamorgan team to win a knockout trophy.
Right, all together now...
"We started at Ponty at seven..."
Some will know what I mean. Goodnight!
Glamorgan win the One-Day Cup
Up goes the trophy!
All the team taking their turn to raise it in front of the Glamorgan supporters who managed to get there today.
Proper supporters, following their local team with their own players - what sport is about.
Video content
Post update
Glamorgan captain Kiran Carlson:
"I'm chuffed for all the lads. This game here showed how exciting 50-over cricket can be and to win a trophy is unbelievable.
"They probably had the strongest batting line up in the competition so we all knew we needed a score about par and then back our bowlers.
"Michael Hogan has been out best bowler in the whole tournament and he's not retiring any time soon!"
Post update
Man of the Match goes to Andrew Salter for his useful runs and then a wonderful spell:
"It's a crazy one to compute. It's a bit emotional for us.
"I think it was a par score and we knew we had to bowl well and take our chances and we did that.
"A special mention to Kiran Carlson, that was a proper captain's knock.
"I'm chuffed to contribute for the boys and get that win."
Glamorgan win the One-Day Cup
Durham 238 v Glamorgan 296-9
Time for the presentation.
Durham captain Scott Borthwick:
"I'm incredibly proud of the boys over the course of the competition, we've played some fantastic cricket but it wasn't to be today.
"It feels like Durham are back on track now and we're really proud of what we've achieved."
Post update
Graham Onions
Former Durham and England bowler on BBC Radio 5 Live Sports Extra
Congratulations to Glamorgan.
They played thoroughly well and did brilliantly to get up close to 300 and then the bowling unit all played their parts.
The passion in the field was tremendous too, they really rallied round captain Kiran Carlson.
Glamorgan win One-Day Cup
Glamorgan win One-Day Cup
Glamorgan win the One-Day Cup
Durham 238 v Glamorgan 296-9
A first trophy for Glamorgan since 2004 and a timely success too when there are more questions than ever about the future of the 18-county structure.
They've won it to a large degree thanks to their tenacity with the bat.
Times threatening positions were snuffed out but they kept scrapping and those 33 added by the final pair were very important.
Joyous scenes at Trent Bridge - just what a shame there was only half a crowd thanks to the stupid scheduling.
You feel a little sorry for Glamorgan in that regard.
It's been a cracking days cricket and deserved a showpiece Saturday at Lord's.
Post update
Glamorgan seam bowler Michael Hogan speaking on Sky Sports:
"I'm a little bit lost for words really - it's an awesome feeling.
"I've worked hard for 17 years for a moment like this, so it's great.
"It was an awesome performance from everyone and so well deserved. We got on a roll in this competition and built some momentum and we've carried that all the way through to this final.
"I'm looking forward to an eventful evening ahead."
Glamorgan win the One-Day Cup
Durham 238 v Glamorgan 296-9
This has been an outstanding defence.
Andrew Salter started things off with the run of wickets outside the powerplay.
They keep the squeeze on, got a bit of luck with the wicket of Cameron Bancroft but didn't allow any other partnerships.
Sean Dickson finishes 84 not out, a valiant effort, but after Bancroft went, no-one else could stay with him.
Glamorgan were on the end of a hammering in their last cup final back in 2013 but they've dished out one of their own here.
Post update
Mike Powell
Ex-Glamorgan batsman on BBC Radio Wales
The fact Michael Hogan took the last wicket speaks volumes - what a performer and servant he has been for this county.
What a day for Glamorgan! They should be very proud of what they've achieved today.
Post update
Nick Webb
BBC Radio Wales
Glamorgan have won a one-day final for the first time in their history.
They're dancing in the stands and on the pitch!
GLAMORGAN BEAT DURHAM BY 58 RUNS
Durham 238 v Glamorgan 296-9
They've done it!
Michael Hogan draws the edge from Chris Rushworth and it's the easiest catch for Tom Cullen that has sealed victory.
What a wonderful moment for Glamorgan and cricket in south Wales.
Video content
Durham 238-9 9 (Target 297)
Durham need 59 in 30 balls
Glamorgan on the cusp now of their very first knockout trophy.
Surely they cannot be denied now.
WICKET Trevaskis c Selman b Cooke
Need 59 in 30 balls
The rate hits two a ball required for the first time.
Liam Trevaskis takes a ball from outside off to the midwicket fence.
And then another from a straighter line backward of square!
But trying again he can't clear the ropes and is well held by Nick Selman running in from long-on.
Durham 227-8 (Target 297)
Need 70 in 36 balls
What an over!
Two wickets and only the single.
Post update
Nick Webb
BBC Radio Wales
Durham are running out of men as Glamorgan's players gather to urge each other not to lose their cool.
Glamorgan on the verge now.
WICKET Potts c Cullen b Carey 0
Need 70 in 38 balls
The wicket brings out a new man and we've seen today how hard it's been to get going.
Matty Potts tries to carve a ball to third man and just edges to the wicketkeeper who takes a smart catch diving to his right.
Post update
Jake Ball
Notts and England bowler on BBC Radio 5 Live Sports Extra
Luke Doneathy and Sean Dickson may well have had a chat there before that ball that if he had a go at adding a few boundaries and made sure that Dickson was still there at the end, there's a chance.
I don't mind that shot too much as Doneathy's tried to take some pressure off Dickson.
Terrific catch by Carlson though under lights. It was in the air for a long time!
I disagree Jake. Doneathy was doing a decent job and the stand was building.