Group 1: Durham v Essex; Warks v Notts; Worcs v Derbys
Group 2: Leics v Middlesex; Surrey v Glos
Group 3: Lancs v Yorks; Sussex v Northants
Olivier c Wells b Lamb 10 (Yorkshire 159 v Lancashire)
The Yorkshire recovery continues, from the depths of despair this morning at 40-7.
After the 77 put on by Harry Duke and Steve Patterson, the Yorkshire last pair have had some fun too.
Ben Coad and Duanne Olivier added a further 39. But, after a delayed tea, Danny Lamb finally bagged Olivier.
Essex 182 v Northants
A remarkable ending to the Essex innings!
The visitors lose their last five wickets for just three runs at Chester-le-Street to end on 182 all out.
Michael Pepper's 92 - his best in first-class cricket - accounts for more than half of their total.
Peter Siddle was the last man to go, bowled by Ben Raine.
Essex 182-9 v Durham
Sam Cook goes without scoring - another dismissal for Chris Rushworth - and Essex are nine down!
Warwickshire 163-3 v Notts
Teatime in Birmingham, where Will Rhodes goes for 91 in the last over before tea.
Rhodes and Sam Hain had progressed the Warwickshire innings steadily throughout the afternoon session.
But Liam Patterson-White ends their 85-run stand
Essex 182-8 v Durham
With Michael Pepper's superb stay over, Essex are in danger of collapsing in a complete heap here.
Ben Raine and Chris Rusworth have now taken two wickets apiece, sending Adam Wheater (eight) and Simon Harmer (one) on their way.
Sussex 175 v Northants
Adrian Harms
BBC Radio Sussex
A terrific effort from 20-year-old Jack Carson, and 19-year-old Henry Crocombe, who added 99 for the Sussex ninth wicket.
Both made highest first-class scores, Carson made his maiden first-class half-century, whilst Crocombe was left stranded on 46
Ben Sanderson, who took 5- 45, has now taken 15 wickets against Sussex this season, and has also taken 37 wickets against Sussex in just seven first-class matches.
Sussex 175 v Northants
That's a wrap for Sussex, who at one point were 67-8 but end up on 175 all out.
That was largely thanks to 52 from Jack Carson and an unbeaten 46 from Henry Crocombe.
Ben Sanderson ends up with 5-45.
Essex 180-6 v Durham
Michael Pepper has been dismissed lbw by Chris Rushworth eight runs short of a maiden first-class century.
His 92 is still his best-ever score and has dragged Essex towards a more respectable total.
Worcestershire 214-4 v Derbyshire
Brett D'Oliveira follows Gavin Haynes to his half-century at New Road.
At tea, the pair are now just one short of a century stand.
Dolly is on 52, Haynes on 91. Good recovery that from 62-3, especially after losing Daryl Mitchell to the first ball of the day..
Surrey 174-4 v Gloucestershire
Hashim Amla has reached his half-century from 115 balls, including seven boundaries.
He and Will Jacks (23 not out) at the other end have settled Surrey after that mini flurry of wickets.
Worcestershire 201-4 v Derbyshire
First batting point of the day in the County Championship comes at New Road as Worcestershire go past 200 against Derbyshire.
That is largely down to 89 from Jack Haynes, who has surpassed his career-best score for the second time in three weeks.
But he has had good support from Brett D'Oliveira (41) in a so far unbroken stand of 86.
Duke c Vilas b Bailey 52 (Yorkshire 121-9 v Lancashire)
As so often happens after a long partnership, one batsman goes and the other follows.
In the next over after Steve Patterson's departure, in fact just four balls later, Tom Bailey returns to find Harry Duke's edge - a third wicket for the Lancashire paceman.
Recalled Duanne Olivier is the new man in to join Coad.
Middlesex 132-6 v Leicestershire
Two wickets in the space of two balls for Callum Parkinson!
First he dismisses Robbie White for 16 and then traps Martin Andersson in front for a golden duck.
This is turning into a really good day for Leicestershire.
Patterson b Parkinson 27 (Yorkshire 127-8 v Lancashire)
Finally a breakthrough for Lancashire at Old Trafford as Matt Parkinson bowls Steve Patterson.
The Yorkshire skipper had just started to chance his arm and play some shots, having hit a six and a four in the previous over but this time Parky gets one through and his 77-run stand with teenage wicketkeeper Harry Duke is over.
Duke remains on 52, while new man Ben Coad's first scoring shot is a boundary.
Warwickshire 138-2 v Notts
Will Rhodes has now moved on to 80, while Sam Hain has made 21.
It's quite slow progress at Edgbaston as the Bears have taken 53 overs to get to 138-2, but these could be important runs in this battle of 4th v 1st in Group One.
Yorkshire 100-7 v Lancashire
100 up for Yorkshire, just a ball after Harry Duke had got to his maiden first-class fifty.
"That's a terrific effort" says BBC Radio Lancashire's Scott Read.
Image source, Getty ImagesNot even the introduction of spinner Matt Parkinson into the previously all-seam attack had had an effect.
From 40-7 in the 18th over, this Yorkshire eighth-wicket pair have now batted for 30 overs.
But Lancashire have put three chances down, including one off Duke at leg slip.
Middlesex 122-4 v Leicestershire
Middlesex captain Peter Hanscomb has been dismissed for 26 at Leicester, pinned in front by Ed Barnes, as Leicestershire continue to take wickets.
Each of the visiting top four have got starts - 23, 38, 21 and 26 - but none have been able to go on.
Essex 140-5 v Durham
Michael Pepper continues to build upon his best-ever first-class score, now on 69 from 134 balls, but Ryan ten Doeschate has been dismissed by Scott Borthwick for eight at the other end.
Essex are 140-5 at Chester-le-Street.
Yorkshire 94-7 v Lancashire
Excellent effort from Harry Duke and Steve Patterson at Old Trafford.
From a first-baller on his first-class debut a fortnight ago at Sophia Gardens, Duke is now just two short of a maiden fifty.
Between them, he and Patterson (10) have more than doubled the score - and, after taking wickets at will this morning, Lancashire now must wonder where the next one is coming from.
Surrey 133-4 v Gloucestershire
Hashim Amla remains unbeaten on 39, but there's been plenty happening down the other end.
Laurie Evans is the latest man to fall for six and, from a comfortable 105-1, Surrey are 133-4.
Excellent fightback from Gloucestershire here.