Northants heading for a quick defeat as Wayne Madsen (39) hits a four to give Derbyshire just 15 more to chase from their last five overs.
Kent take 12 runs from Imran Tahir's final over.
The hosts need 38 runs from the final five overs to take victory.
Henry Brookes sends down an economical over for Birmingham Bears - over to skipper Jeetan Patel now to try and force a breakthrough.
50 up for Moeen Ali off just 28 balls with six fours and three sixes.
Classy shots all over the park. I imagine my colleagues will be making a highlights reel out of that later!
Worcestershire needed that!
Moeen Ali strikes Will Rhodes for a six straight down the ground first ball of his spell.
Happy with one? No - repeats the dose very next ball with a nice bunt over deep mid wicket for six more.
The breakthrough Surrey needed, as Zak Crawley is stumped by Ben Foakes.
The batsman was attacking Imran Tahir, but the expereinced South African matched to catch the opener out.
Still, Crawley and Daniel Bell-Drummond (52 not out off 34 balls) have got Kent off to a great start.
Tahir is a dangerous man to let into the game though. Heino Kuhn is the new man in for the Spitfires.
Decent over from off-spinner Chris Green to keep things tight for Brimingham.
Seven overs to go and Rapids see their required rate climb again.
Ryan Higgins finishes it all off for the hosts as Alex Waller is caught by Tom Smith.
Gloucestershire strengthen their place in the top four after beating a Somerset side who started the evening a point and a place behind them.
Glos move on to 14 points and leapfrog Middlesex.
They could be up to second if Kent lose, but the Spitfires are well placed in their match against Surrey.
Hi Ho Silver Lining belts out across the Edgbaston PA.
Worcestershire look like they'll be finding that silver lining at this rate as Riki Wessels and Moeen Ali keep their score ticking over.
Two wickets in the 19th over from Andrew Tye have almost tied this one up for Gloucestershire.
Tom Lammonby is bowled for 31 and then Tim Groenewald goes for a duck.
Somerset need an unliekly 27 from the final over.
It was all a little bit too easy in the end for Nottinghamshire as they chased down Leicestershire's total of 161-8.
Alex Hales struck a classy 60 while Ben Duckett fell just short of his half-century, making 47.
Kent are making straightforward work of this chase.
Zak Crawley has moved on to 53 not out, with two fours and three sixes in his knock.
Daniel Bell-Drummond is on to 45 unbeaten.
Kent need 71 to win from 10 overs. They'll get them easily unless Surrey take some wickets.
Worcestershire showing just why they are such a dangerous force to retain their title this year.
Moeen Ali and Riki Wessels making light work of this target of 185 at this stage.
Bears in desperate need of a breakthrough to stop some of these shots from Moeen Ali...
A relatively tight over from Ryan Higgins, who then picks up the wicket of Roelof van der Merwe
Tom Lammonby is still there unbeaten on 30, but Somerset need another 29 runs from 13 balls...
Tim Groenewald is the new man in.
Derbyshire taking their time, looking relaxed as they reach 50-1.
Billy Godleman with 17 and Wayne Madsen with 12 runs guiding the hosts to a seemingly big win.
A quite extraordinary collapse by Durham hands Yorkshire a vital win....
Jack Shutt with 5-11 and Adam Lyth with 3-19 the chief destroyers.
Moeen Ali on a mission here for Worcestershire.
Rapids are chugging along nicely and Moeen has 25 off just 13 balls with some brilliant striking.
This one's going the distance.
Well, well - talk about spurning a great chance.
Durham have well and truly thrown away this game against Yorkshire after being in total control at 70-0 chasing 147.
Adam Lyth in on the act now to take crucial wickets in the closing stages and Yorkshire need just one more for an unexpected win.
Somerset have come back into it at Bristol through Tom Lammonby, who has 25 runs off 11 balls.
The visitors need 45 runs to win from the final four overs to win.
This is still doable...
Moeen Ali in at three for Worcestershire and he fancies this tonight.
An impressive six deep into the stands at Edgbaston off Henry Brookes. Superb striking.
Follows it up with a straight four down the ground next ball.