Derbyshire, Worcestershire & Essex top regional groups
Glos close on 14-3 chasing 385 to beat Somerset
Worcs close on 170-0 after Warks make 355 (Rhodes 207)
Lyth fifty drives Yorkshire to 178-6 in Roses match
Essex's Cook makes 117th first-class fifty
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Surrey v Kent 342
Surrey paceman Adam Finch finishes off the Kent innings by removing Matt Milnes to claim figures of 4-69.
A very competitive first-innings total from the visitors at The Oval.
Leics 222 v Notts 86-0
After a couple of seasons where he couldn't buy a run for Lancashire, Haseeb Hameed is creeping back into a bit of form this summer.
The former England opener brings up his third half-century of the Bob Willis Trophy competition off 80 balls for his new county Notts.
Could we see the 23-year-old back in the international fold soon?
Image source, Rex Features
Hankins c C Overton b J Overton 6 (Somerset 237 v Gloucestershire 48-6)
Great piece of bowling by Jamie Overton.
He goes wide on the crease, angles one into George Hankins, forces him to play, squares him up, finds some seam movement, takes the edge.
And it's brother Craig at second slip to take a good low catch.
Somerset with eyes on a match-winning lead.
Worcs v Warwickshire 281-3
The milestones keep coming for Will Rhodes.
He's now gone past the highest score of his career in any official cricket, beating the 176 for Yorkshire 2nd XI v Lancashire in 2017.
The problem for the Bears is that they've got fewer than 20 overs left of their first innings now, with the 120-over cut off in this competition, and they haven't got a massive score.
Progress this morning has been brisker but unless they really ramp things up, maximum batting points is beyond them.
We've almost got in a full hour of cricket at all nine grounds this morning! Incredible scenes.
Image source, Rex Features
Durham 257-6 v Derbyshire
Paul Coughlin (70*) and Durham captain Ned Eckersley (29*) bring up their 100 stand for the seventh wicket.
Derbyshire's hopes of holding onto top spot in the North Group are taking a bit of a bruising.
Kohler-Cadmore c Jennings b Bailey 18 (Yorks 53-1 v Lancs)
Breakthrough for Lancashire!
Tom Bailey finds Tom Kohler-Cadmore's edge and Keaton Jennings clings onto a sharp, low catch at slip.
Will Fraine is in at three for Yorkshire with Jonny Bairstow on England T20 duty.
Image source, Rex FeaturesIn the South Group Kent's lower order continues to rally against Surrey at The Oval. Matt Milnes and debutant Nathan Gilchrist have taken them to 332-8 with a stand of 40.
Sussex seamer Ollie Robinson took the early wicket of Middlesex opener Sam Robson - Middlesex are 15-1 replying to Sussex's 293.
In the North Group Haseeb Hameed is still looking good for Notts - the opener is up to 47 with his side on 68-0 against Leicestershire. Notts trail by 154.
Northants are going well against Glamorgan in the Central Group. Charlie Thurston has just reached his half-century off just 67 balls and Northants are 112-1 in reply to Glamorgan's first-innings 259.
Taylor c Lammonby b Davey 12 (Somerset 237 v Gloucestershire 29-5)
It's taken half an hour - riches of resistance for the Glosters - but Somerset and Josh Davey have the breakthrough.
A full wide delivery and Matt Taylor has cracked it to point.
Possibly there to hit but Taylor didn't get his weight into the shot and skewed a catch to Tom Lammonby.
Hants v Essex 24-0
Image source, Rex FeaturesIt's also been a solid start for Essex at Arundel with stand-in opener Paul Walter striking three boundaries to move to 14. Alastair Cook has been his watchful self and has a couple.
Yorkshire 38-0 v Lancashire
Yorkshire are scoring at a good rate this morning, but not without a couple of alarms.
Lancashire keeper Alex Davies shelled a low chance off Tom Kohler-Cadmore when he dived in front of first slip.
But the White Rose county will be happy with the scoreboard.
Worcs v Warwickshire 244-3
What a day for Will Rhodes yesterday. His career-best 142 putting Warwickshire in a great position having been sent in.
And delivering a big blow to Worcestershire's hopes of reaching the Bob Willis Trophy final.
Hasn't taken long for Rhodes to move to 150 with two fours off Joe Leach - a square drive and a clip through square leg.
Somerset 237 v Gloucestershire 21-4
What a task the Glosters have this morning to repair the carnage of last night.
They've got to scrap their way to at least 150 you'd think to stay in the game.
One thing perhaps in their favour is that they have batting down the order.
But they simply have to get in the fight and show some resistance, otherwise it could be a pretty embarrassing first-class return to Taunton.
Image source, Getty ImagesYorkshire 21-0 v Lancashire
Three boundaries already for Yorkshire this morning - a couple of clips off the pads from Adam Lyth, who also survived a strong shout for lbw by Tom Bailey, and then a glorious drive through mid-on by Tom Kohler-Cadmore.
It's overcast at Headingley, but the pitch looks a good one for batting.
Durham 227-6 v Derbyshire
Durham all-rounder Paul Coughlin, on 46 overnight, brings up his half-century against North Group leaders Derbyshire.
Derbyshire will be desperate to finish off this Durham first innings sharpish this morning.
Yorkshire 8-0 v Lancashire
They're also under way at Headingley after yesterday's relentless rainfall.
Yorkshire openers Adam Lyth and Tom Kohler-Cadmore resume for the hosts against their biggest rivals.
Hants v Essex 0-0
After Saturday's washout, the game is finally under way at Arundel.
Paul Walter and Alastair Cook are opening for South Group leaders Essex, Walter moving up the order to replace Nick Browne.
Brad Wheal starts with a maiden for Hampshire.
Image source, Rex FeaturesWell, well, it looks as though play is going to start on time in all nine games!
We'll be keeping a close eye on happenings at Headingley, Chester-le-Street, New Road, Taunton and Arundel as well as bringing you regular updates from the other four matches.
Let's go...
Every ball covered
As ever there will be ball-by-ball local radio commentary from all nine matches.
To tune in, click on the links at the top of this page.
Bob Willis Trophy
Here's a reminder of how the tables looked heading into this fourth round of matches. The two group winners with the most points go through to the five-day final at Lord's in late September.
North Group
Image source, .Central Group
Image source, .South Group
Image source, .