After being inserted by Gloucestershire, Tom Kohler-Cadmore got over his semi-final golden duck to make a bright start with Will Smeed, smashing 28 off the first three overs.
But Somerset then wobbled as Smeed steered Matt Taylor’s first ball straight to backward point. And Taylor then added a second wicket in the over when he deceived Kohler-Cadmore with his slower ball and Tom Price took an off-side catch.
Taylor then had another off the final ball of his next over when James Rew was caught in the covers by a diving Cameron Bancroft. And, just two balls later, Somerset’s other semi-final half-centurion hero Sean Dickson also fell cheaply first ball when he reverse-swept into his leg stump, off Ollie Price.
Tom Abell perished to Tom Price at long on, then David Payne struck twice in two balls when Benny Green was caught off a leading edge at backward point and Craig Overton looped a slower delivery to Jack Taylor diving forward to take the catch at mid off.
After Roelof van der Merwe was caught behind, captain Gregory eked a few more to go to his half-century before he was ninth out and Jake Ball was last out in the final over.
But 124 – the lowest first-innings score in a T20 final since Warwickshire made just 115 in the very first final in 2003 – never looked nearly enough.