Nine matches: five in Division One, four in Division Two
First v second in Division One as Surrey play Notts at The Oval
Tom Abell & Kasey Aldridge hit 100s for Somerset against Hampshire
Essex's Charlie Allison out for 98 against Warwickshire
Bottom two facing each other: Durham v Worcestershire
Rishi Patel scores 114 for Leicestershire - Corey Flintoff makes red-ball debut for Kent
Glamorgan will be promoted if they win against Derbyshire with at least 19 points
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Surrey 173 v Notts 231 & 89-6
Mark Church
BBC Radio London commentator
I think Kyle Verreynne got a tough one there but the finger went up from Nigel Llong.
This is fascinating at the moment.
White c Haines b Carson 5 (Sussex v Yorks 194)
Jack White has a swish at a ball from Jack Carson, there's a little bit of turn and Tom Haines takes a smart catch at first slip.
Advantage Sussex in this match-up between two teams still caught up in the relegation scrap.
Leics 320-5 v Kent
A few lessons being learned out there by the Kent youngsters.
Oliver Curtiss gives Ben Cox far too much width and is cut powerfully for four, who is now 22 not out.
Higgins c Jones b Aspinwall 0 (Lancs v Middx 66-4)
And that is two in two and the set up for a hat-trick for Tom Aspinwall.
Ryan Higgins is undone by a perfect opening delivery to a new batsman. Good length, slight bit of movement away and a nick to Michael Jones at first slip.
Verreynne c Foakes b Worrall 18 (Surrey 173 v Notts 231 & 89-6)
Another edge, another catch...
Kyle Verreynne looks, let's say disappointed to be given out caught behind off Dan Worrall.
It doesn't matter what he thinks, he's on his way.
Notts lead by 147 runs.
Liam Patterson-White is in.
du Plooy c Hurst b Aspinwall 22 (Lancs v Middx 66-3)
Image source, Rex FeaturesRegulation delivery, regulation nick and a regulation catch behind the stumps by Matty Hurst.
Critchley c Davies b Booth 47 (Warwicks v Essex 209-4)
This one does stick.
Michael Booth has had Charlie Allison dropped in the slips but Alex Davies holds onto the edge from Matt Critchley to give the Bears bowler some reward.
Michael Pepper is in for Essex.
Surrey 173 v Notts 231 & 88-5
Off we go at The Oval again.
We have 32 overs remaining in the day - what more drama can they offer?
Notts lead by 146 runs.
Warwicks v Essex 200-3
Essex get to 200 but almost lose a fourth wicket straight away.
Charlie Allison is grassed in the slips - three have gone down for Warwickshire now.
Glos v Northants 199-8
Two in two for Gloucestershire.
Graeme van Buuren has Aadi Sharma caught by Matt Taylor for 14 and then wins an lbw decision against Ben Sanderson with his next delivery.
Ben Whitehouse joins Richard Keogh, who is 12 not out.
Leics 301-5 v Kent
Image source, Rex FeaturesKent give Oliver Curtiss his first bowl in Championship cricket and he is twice driven to extra cover for four by Shan Masood.
Ben Cox then pulls Ekansh Singh to the square leg boundary as Leicestershire secure their second batting point by reaching 300.
Thompson lbw Carson 36 (Sussex v Yorks 179-9)
Image source, Adrian Harms/BBC SussexA portent of what may be to come tomorrow?
The lights are on at Hove as Yorkshire resume after tea and Jordan Thompson falls without adding to his score as he plays round a floated delivery from spinner Jack Carson and is bowled.
All three bowling points in the bag for Sussex.
Warwicks v Essex 188-3
It was a tricky start to the season for Essex youngster Charlie Allison but that was when he was asked to open the batting in the absence of Dean Elgar.
Since dropping down the order he's looked very much the part.
This is Aliison's fourth first-class 50 and in his previous three he's converted it to a century.
Somerset 209-5 v Hants
Into the final session of a match which would be well poised had it not been for the day one washout.
Kasey Aldridge and Tom Abell are at the crease for the hosts and Kyle Abbott and now Washington Sundar with the ball.
Surrey 173 v Notts 231 & 88-5 - tea
Dave Bracegirdle
BBC Radio Nottingham commentator
I'm not entirely sure who would claim to have the upper hand in that session. The first portion of it will certainly belong to Nottinghamshire as they quickly tore through the Surrey order but they have themselves lost five key wickets.
Surrey can claim the second half of the afternoon session and have roared back in to this game.
Who's situation would I rather be in? I really don't know.
Derbyshire v Glamorgan 176-6
They are running a little behind the other games at derby, owing to a half-hour delay at the start of play.
Glamorgan have added 96 to their lunch score but lost three wickets in the process and the innings has been held together by Kiran Carlson, who is unbeaten on 88 from 166 balls.
He has put on 77 with Timm van der Gugten (21*) since they came together following the dismissal of Billy Root and Chris Cooke in successive Anuj Dal overs.
Warwickshire v Essex 180-3 - tea
Mike Taylor
BBC WM commentator
Essex moved closer to the batting points that might secure their first division status with a well-made partnership, so far worth 69, between Charlie Allison and Matt Critchley.
Allison has batted with some style to reach 46, unafraid to occasionally leave his ground to make the seamers adjust their length, while Critchley looked in the same good touch that earned him a hundred against Durham last week.
Warwickshire had shaken Essex with a spell of more accurate bowling after lunch, that yielded two wickets and might have brought more. Dean Elgar survived a chance off the luckless Oliver Hannon-Dalby – dropped by Rob Yates stretching to his left at second slip – but the same fielder made amends in the next over, grabbing a hard edge induced by Nathan Gilchrist.
Tom Westley was unruffled but not fluent, and had come to a halt on 25 before driving over a full inswinger from Ethan Bamber that relocated his off-stump.
That seemed to offer an opening for the Bears, but the seamers plugged away without any further encouragement. The spinners appeared for the last few overs of the session, but one ball from Rob Yates turned sharply enough to perhaps earn him another shift after tea.
Surrey 173 v Notts 231 & 88-5
Image source, RexWhat a session, what a day.
We've seen 14 wickets go down today.
Matt Fisher has taken nine in the game for Surrey and Notts lead by 146 runs.
The ball is seaming and swinging, making it so difficult for the batsmen.
I think that just about covers it.
Gloucestershire v Northamptonshire 194-6
Almost an exact replica of the morning session with Northants adding 94 to their score for the loss of three wickets.
Gloucestershire were especially glad to see the back of Saif Zaib, who took his runs aggregate for the season to 1,268 but was caught behind off Zaman Akhter for 76.
Matt Taylor, though, has been the home side's most successful bowler with 3-48 from 14 overs so far.
Durham v Worcs 202-4
Another session shaded by Worcs who will be more than happy with their tea time position with Gareth Roderick and Brett D'Oliveira both unbeaten on 34 and with the partnership up to 63.
Durham will feel they have had little reward for some good bowling, particularly Matthew Potts who beat the bat several times without finding the stumps or the edge.