Day two of all games
18 counties split into three regional groups of six
Each side will play five games
Two teams with most points contest five-day final
Get involved #bbccricket
Leicestershire 199 v Derbys 205-2
It's another half-century for Derbyshire, this time for Leus du Plooy, who reaches the milestone in 70 balls, including eight fours.
The visitors are already passed Leicestershire's first innings total and Wayne Madsen looks on for a ton. He's on 78 at the other end.
Stoneman c Cook b Harmer 5 (Essex 262 v Surrey 35-3)
Big wicket for Essex on the stroke of lunch.
Mark Stoneman, after battling his way to just five off 65 balls, edges spinner Simon Harmer to Alastair Cook at slip.
Surrey are three down and in a bit of bother.
Gloucestershire 210 v Warwickshire 55-2
Fifty up for the bears just before lunch.
Will Rhodes looks set on 26, while England legend Ian Bell has 13.
Durham 180 v Lancs 95-2
It's a 50 partnership for Lancashire's Josh Bohannon (22) and Dane Vilas (28).
Just 85 runs behind Durham's first-innings total now with eight wickets in hand.
Northants 67 v Somerset 166 & 167-8
Somerset's lower order has just about put this game out of reach for Northants.
Jamie Overton is now finding the boundary - he's struck five fours in his 26 off 15 balls.
The lead is 266.
Image source, Getty ImagesKent 84-0 v Sussex 332
Kent opener Jordan Cox brings up his maiden fifty at Canterbury.
The 19-year-old has struck eight boundaries.
It's been a really solid start for the hosts with Daniel Bell-Drummond also looking good at the other end.
Worcestershire 424-7 v Glamorgan
Worcestershire are losing some wickets now in a search of quick runs - Ed Barnard the latest to go, caught on the rope off Michael Hogan.
They have four overs left of their allocated 120 in the first innings.
Last 15 minutes before lunch.
Can anyone - young or old - grab another wicket?
The oldest cricketers on the first-class circuit
Ben Timmo: Gareth Batty is older (42 years 9 months 27 days), but hasn't been given a game this year.
bROCKerz: Would you count Jeetan Patel - hasn't played this year but is listed in the bears squad (40+94 days)??
Leicestershire 199 v Derbys 180-2
We've just passed 43 overs at Grace Road and Derbyshire are well on top.
Wayne Madsen (62) and Leus du Plooy (41) are frustrating the Leicestershire bowlers.
Just 19 runs behind the hosts' first innings score now.
C Overton c Curran b Berg 53 (Northants 67 v Somerset 166 & 151-8)
An innings of mighty blows by Craig Overton comes to an end just after he passes 50.
53 off just 30 balls including six fours and three sixes. Not a lot of running in there for the big man!
He's taken Somerset's lead up to 250... should be plenty.
The oldest cricketers on the first-class circuit
Peter Goodwin: Ryan Ten Doeschate is 40 years and 40 days old
Matt Nash: Ryan Ten Doeschate is the wrong side of 40
'Wrong side'- Matt's words people, not ours.
Middlesex 252 v Hants 74-3
It's slow and steady from Hampshire in this morning session.
Joe Weatherley and Sam Northeast are ticking things along for the visitors at Radlett.
Hants trail by 178.
Image source, Rex FeaturesThe oldest cricketers on the first-class circuit
Michael Baxter: Peter Trego?
Nice, 39 years and 58 days. Can anyone join Darren Stevens on the other side of 40?
D'Oliveira c Cooke b Wagg 174 (Worcestershire 410-6 v Glamorgan)
Another epic innings is over at New Road.
Shortly after Jake Libby went for 184, Brett D'Oliveira is caught behind as he tries to guide Graham Wagg down to third man.
21 fours and a six in D'Oliveira's 174 off 262 balls.
Durham 180 v Lancs 82-2
Martin Emmerson
BBC Newcastle
The Durham bowlers struck twice in the first five overs of the day to see off openers Alex Davies and Keaton Jennings.
Davies fell to the third ball of the day and didn't add to his overnight score of eight. He edged Ben Raine to David Bedingham in the slips, while trying to leave the ball.
Jennings was then caught on 18 at third slip by Alex Lees off the bowling of Chris Rushworth - the ball sticking at the third attempt to leave them on 43-2.
However captain Dane Vilas (22) and Josh Bohannon (15) have steadied things for the visitors.
Durham 180 v Lancs 80-2
Lancashire are starting to build a platform after losing both their openers at the start of the day.
Dane Vilas has just clipped Ben Raine off the pads for four. A proper cricket shot that from the Lancashire batsman.
They're within 100 of Durham's first innings lead now.
BBC Newcastle commentator Martin Emmerson has more...
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Van der Merwe c Vasconcelos b Glover 30 (Northants 67 v Somerset 166 & 120-7)
Roelof van der Merwe edges Brandon Glover to slip, but his cameo with Craig Overton may well have won this game for Somerset.
The pair put on 67 in less than 10 overs. Somerset lead by 219 as Jamie Overton joins his twin brother in the middle.
The oldest cricketers on the first-class circuit
Alice Worsley: Tim Murtagh is up there for older cricketers #bbccricket
At 39 years and seven days, the Middlesex man is our new second place.
Essex 262 v Surrey 21-2
No further damage for Surrey after Essex seamer Jamie Porter reduced them to 1-2.
Mark Stoneman and Will Jacks are digging in for the visitors at Chelmsford.