Somerset 75 for 2 (Banton 40) beat Hampshire 74 (Overton 3-8, Green 2-11) by eight wickets
Beaten in last season’s semi-finals by the same opponents, the hosts dominated from the start after winning the toss, Overton claiming 3 for 8 from four overs and Henry 2 for 19 from three to leave the Hawks 27 for 5.
Overton and Henry appeared to be trying to outshine each other when the Hawks innings began in front of a packed crowd, both maintaining excellent line and length.
Sam McDermott fell to the last ball of Overton’s opening over, caught two-handed to his left by Tom Kohler-Cadmore at slip.
It was 9 for 2 when Henry struck with his first delivery, bowling James Vince between bat and pad with a ball that nipped back. The New Zealand Test bowler then had Joe Weatherly caught at mid-on by Overton off a skyer to make it 12 for 3 in the fourth over.
By the end of the six-over powerplay, the Hawks were in disarray at 26 for 3. Their plight worsened when Overton had Tom Priest caught behind attempting to pull a short ball.
Overton notched his third victim in the same over as Toby Albert was also snaffled by wicketkeeper Banton, going hard at a wide delivery.
Albert had scooped a six off Henry, but it was a rare moment of defiance from the Hawks as Overton produced 17 dot balls in bowling his allotted four overs straight through from the River End.
Rightly impressed by his opening attack, Somerset skipper Tom Abell did not make a change until the eighth over, which saw Peter Siddle replace Henry.
Ross Whiteley hit fours off successive balls from Gregory and Liam Dawson pulled a a six off Green as Hampshire briefly threatened a recovery.
But, having helped take the score to 57, Dawson fell to another Overton catch, this time at fine leg off a scoop, and Scott Currie went in the same Gregory over, the 12th of the innings, bowled off a bottom edged pull shot.
Whiteley had reached his side’s top score of 18 when caught by Kohler-Cadmore, diving forward at long-off, having made decent contact with a Green full toss.
At 61 for 8, the Hawks were down and out. Chris Wood was pouched by the diving Overton at mid-off off Green, who completed the rout by having Nathan Ellis, who had taken 13 off Henry’s final over, caught at long-on by the same fielder.
Somerset’s big-hitting batting line-up were never likely to be troubled chasing such a paltry total and Banton soon signalled his intentions to end the match early by clearing the ropes with a ramp shot off Wood in the third over.
A scoop off Ellis brought the England T20 international another boundary, followed next ball by a clip through the leg side for four. Will Smeed was caught at short third man for 5 in the same over, but by the end of their power play, Somerset were comfortable at 37 for 1.
Banton launched another six over mid-wicket off Dawson before being stumped in the same over chasing a wide one. Kohler-Cadmore (18 not out) got off the mark by smashing the spinner over wide long-on for a maximum and by then the outcome had long been beyond doubt.