Graham Wagg has continued his good game to turn the screw on Kent in the final overs.

The spinner has kept Fabian Cowdrey and Darren Stevens relatively quiet, but Stevens is an experienced campaigner. He's currently on 20 from 15 balls, with three boundaries.

Cowdrey found it tougher going before he was eventually trapped lbw by Michael Hogan for 1, while Alex Blake could only make a two ball duck.

Kent need 22 runs from the final 12 balls.

Birmingham Bears have started their pursuit of 146 to beat Lancashire at Edgbaston.

Opening up - guess who? Yep, big-hitting Brendon McCullum with captain Varun Chopra for company.

With Shaun Tait's yorker doing for youngster Ryan Higgins, Essex are turning the screw at Chelmsford.

Middlesex are struggling to find the boundaries and Eoin Morgan being kept off strike.

The England one-day captain has, however, managed to punch Ravi Bopara's final ball of the over away to the extra cover boundary, bringing some relief for the visiting supporters and taking him onto 22.

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Hampshire captain James Vince could carry his bat here at Hove.

Just three overs to go in the visitors' innings and he's on to 73 not out.

He's yet to clear the fence with a six though.

Nottinghamshire are going to set Durham a huge target if the visitors can't find a way to remove Riki Wessels, who's just bludgeoned his fourth six of the innings straight down the ground.

Wessels has 82 runs from 42 deliveries, while James Taylor has moved into the twenties, with only one boundary so far.

Matthew Waite finishes with an unbeaten 14 on his T20 debut as he slashes the last ball of Yorkshire's innings to the boundary.

That's a better score for Yorkshire than it looked like they'd manage at the halfway stage, but Northants must be the favourites.

For the home side, David Willey was the stand-out bowler, finishing with figures of 4-1-24-1.

Jason Roy, take a bow. He bats through the innings and finishes unbeaten on 122, having powered eight fours and six sixes in his mesmeric 65-ball knock.

The last two of those maximums came in the last over, lifting Alfonso Thomas over the longest boundary to bring up the Surrey 200 and then thundering a last-ball full toss over the ropes as well.

No wonder he's received a standing ovation, and even a hug off Jamie Overton, the man who dropped him on 18.

He and Rory Burns (46 from 33 balls, three fours, one six) added an unbroken 124 in the last 11 overs. Some going.

BBC Radio Derby's Iain O'Brien:

"I think Derbyshire could do with a finisher to help them secure a run chase which has been one of their issues this year."

Worcestershire are firmly on course to beat Derbyshire and reach the quarter-finals tonight, as two more Falcons wickets fall at the County Ground.

Billy Godleman picks out Ed Barnard at backward point off the bowling of skipper Daryl Mitchell, before Wayne Madsen becomes Rapids spinner Saeed Ajmal's latest victim.

A much-needed wicket for Sussex at Hove as Adam Wheater departs shortly after making a half-century off 26 balls.

The diminutive wicket-keeper struck four fours and three sixes in his entertaining knock.

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A fantastic half-century from Lancashire captain Steven Croft who has masterminded an almost one-man comeback for the Lightning at Edgbaston.

He loses his partner James Faulkner shortly after though as the Australia all-rounder departs for a quickfire 20.

But, the Blackpool man battles on and finds the boundary with two more fours to finish unbeaten on 64 as Lancashire finish their effort on a respectable 145-6.

Joe Denly's impressive innings has come to an end, but not before he put Kent on course for yet another victory.

Denly made 70 from 36 balls, a season's best for him, with nine boundaries and two sixes before he was caught by Michael Hogan.

Kent are still the favourites, despite Sam Billings falling for just eight. Sam Northeast is just starting to kick into gear - he's on 33 from 26 balls.

Nottinghamshire's Riki Wessels brings up his third half century of this season's T20 Blast with a towering six off the bowling of Chris Rushworth.

Notts will want 180 from here you feel.

Eddie the Eagle, the Essex mascot, does a jig of delight as Nick Gubbins holes out at long off trying to smash spinner Tom Westley into the stands to go to his fifty.

That's an important blow for the hosts, with two relatively new batsmen now at the crease.

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Eoin Morgan strides to the wicket for Middlesex after John Simpson goes for 29, bowled by Graham Napier.

The England one-day captain is quickly up and running, nurdling a couple of twos into the legside and a single to round off the over.

Is this Morgan's night? He's certainly in need of some runs.

Liam Plunkett is doing his best to get Yorkshire into this game, striking David Willey for a huge six, before play is temporarily held up by a pitch invader.

Once the invader has been cleared off, Willey finishes to end with fine figures of 1-24 from his four overs.

To add to Yorkshire's woes Plunkett has fallen in the very next over, bowled by Azharullah for 23.

Hampshire captain James Vince has notched up his fourth 50 of the T20 Blast campaign as his side continue to build a strong platform at Hove.

Wicketkeeper Adam Wheater's giving him great support in his new role at number three in the batting order and has two maximums to his name so far tonight.

He's 35 not out.

Saeed Ajmal forces a hasty rewrite as he removes Wes Durston for a battling 32 from 29 balls.

I had been about to tell you how Durston and Billy Godleman had set Derbyshire back on track against Worcestershire, but that dismissal leaves the hosts in a heap of trouble once again.

Remember a Worcestershire win seals a quarter-final place.

Scott Borthwick has his second catch of the night and a dangerous Nottinghamshire partnership comes to an end.

Michael Lumb is the man to go, slicing an expansive stroke off the bowling of Paul Collingwood to Borthwick at deep cover.

Notts are 81-2 at the halfway point of their innings.

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That's a superb century from Jason Roy - and at a rapid rate too. Fittingly, he gets there with a six, hitting Jamie Overton straight down the ground. He stands with his arms raised then bows.

He was the only Surrey player to have ever got a T20 hundred, and now he has another one.