England's Ben Duckett hits unbeaten 197 for Nottinghamshire
Surrey bowl out Hampshire for 151 at The Oval
Joe Root scores half-century for Yorkshire against Derbyshire
Colin Ackermann makes maiden Durham century against Essex
Marchant de Lange takes 6-49 as Gloucs dismiss Middlesex for 203
Div One: Durham v Essex, Surrey v Hants, Warwickshire v Notts, Worcestershire v Somerset
Div Two: Gloucs v Middlesex, Leics v Northants, Yorkshire v Derbyshire
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Durham 328-7 v Essex
Essex have a wicket in the sixth over of the second new ball.
Sam Cook gets one to nip back on Colin Ackermann and beat his inside edge to catch him in front of middle and leg.
He's not that far forward and it's a decent guess that that will go on to take a decent piece of leg stump.
A fine innings comes to an end - Ackermann's maiden century for his new club.
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A welcome landmark for George Bartlett at Grace Road, as he drives Tom Scriven to the third man boundary to bring up his first half-century for Northamptonshire.
The visitors are ticking along well at 286-4 against Leicestershire, with Bartlett on 53 and James Sales on 10 not out at the other end.
At Bristol, Gloucestershire have recovered from the early loss of Chris Dent against Middlesex, with Ollie Price and Cameron Bancroft taking them to 29-1 in reply to the visitors' total of 203.
Nottinghamshire 312-4 v Warwickshire
Dave Bracegirdle
BBC Radio Nottingham commentator
It's becoming the Ben Duckett show at the moment.
19 boundaries so far in his 165 not out. Within sight of a fifth career double century.
When he's seeing it like this, it must be very difficult for the opposition captain because you bowl him a good ball, he's good enough to put it into any space he wants.
You bowl him a bad ball and he'll absolutely slam it away.
He's a high quality player in the best form of his life at the moment with the confidence to take down any attack and that's a dangerous combination.
Jack Haynes also going well still on 69.
Durham 323-6 v Essex
Simon Harmer and Matt Critchley have got through 38 overs between them today.
Which means they're actually ahead of schedule! God Bless Spin.
So it's already time for the second new ball and back come Jamie Porter and Sam Cook to try and get through the Durham lower order.
Colin Ackermann still there on 111.
Yorks 276-3 v Derbys
Sadly, the rain arrived during the tea interval at Headingley and it hasn't cleared up - so there'll be no further play today.
All being well, Yorkshire will resume in the morning with Joe Root on 65 and Harry Brook 44.
Somerset 210-7 v Worcestershire
Matthew Waite claims a second wicket as he earns an LBW decision against Kasey Aldridge.
New man in to join Tom Banton is South African Migael Pretorius.
Surrey 47-4 v Hants 151
Roland Butcher
Former Middlesex and England batter on BBC Radio London
It's not an easy surface because it's not a wicket you play on the up.
The bowlers really haven't allowed the batters to get on top of them because there has always been something happening with ball.
The majority of the day we've had cloud cover, no sun, so it's made it very difficult for the batters.
Surrey 44-4 v Hants 151
Well this is not what we're used to seeing from Surrey.
Shoot-out cricket on a slippery pitch at the moment.
A 14th wicket of the day that leaves things not far from even.
Kyle Abbott nips one back into Dan Lawrence from a full length, Lawrence falls over a little and gets nailed on the front pad.
Alex Wharf takes his time but raises his finger. Replays back up the decision.
Durham 304-6 v Essex
Colin Ackermann goes to his first century for Durham!
He's glued things together for his side today.
First having the best seat in the ground to watch Ollie Robinson stroke the hosts back into the day.
And then going on to make his 25th first-class hundred.
199 balls and seven fours.
Not really what Durham have been about in the past year or so but the best teams always have a healthy mix of styles and Ackermann has proved his worth here.
A second batting point also on the board for the home side.
Notts 276-4 v Warwickshire
Jack Haynes goes to his half-century for Notts at Edgbaston.
The former Worcestershire man - son of ex-Pears all-rounder Gavin Haynes - missed out on a ton here on his one previous visit in first-class cricket back in May 2001, when he was run out for 87.
But, given how well set he and Ben Duckett look, he could make up for that this time.
Somerset 201-6 v Worcestershire
Tom Banton goes to his half-century - the 11th of his first-class career.
And Somerset go past 200 at Chester Road.
Banton was educated just up the road at Bromsgrove School, played for both Worcestershire and Warwickshire as a junior and also played club cricket at nearby Barnt Green, where his brother Jacques still plays.
Kasey Aldridge is helping Banton get things back on course after those three quick Somerset wickets before tea,
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Rehan Ahmed has his first wicket of the game - and it's an important one, as Northamptonshire captain Luke Procter chops on at Grace Road.
The visitors are 249-4 against Leicestershire now as they approach a first batting bonus point.
Meanwhile, Middlesex's Ethan Bamber has made an early breakthrough at Bristol as Gloucestershire reply to their opponents' 203 all out.
Chris Dent has gone for three and Gloucestershire are 5-1.
Durham 275-6 v Essex
Essex strike just after tea and pick up a second point.
Slightly concerningly, one from Sam Cook shoots through very low from just back of a length.
Poor Brydon Carse is pinned in the crease in front of middle and leg.
Division One
Chester-le-Street: Durham 261-5 (64 overs) v Essex
The Oval: Hampshire 151 all out, Surrey 41-3
Edgbaston: Nottinghamshire 245-4 (64 overs) Warwickshire
Kidderminster: Somerset 181-6 (63.3 overs) v Worcestershire
Division Two
Bristol: Middlesex 203 all out v Gloucestershire
Leicester: Northamptonshire 243-3 (66 overs) v Leicestershire
Headingley: Yorkshire 276-3 (59 overs) v Derbyshire
Surrey 41-3 (Smith b Wheal 13) v Hants 151
Hampshire have another in the last over before tea.
Jamie Smith, like Dom Sibley before him, get a beauty that straightens past the outside edge and flattens the off pole.
Very nice from Brad Wheal and Hampshire are fighting hard to stay in the game having been shot out earlier.
Notts 245-4 v Warwickshire
Ben Duckett goes to tea on 130 in Birmingham.
It's his second century here at Edgbaston, where he has also twice won the T20 Blast with his former county Northamptonshire.
Jack Haynes has so far clubbed six boundaries in his 37.
BBC CWR's Clive Eakin:
"It's been an evenish session. It's fluctuated. But Notts are still in a pretty good position."
Yorkshire 276-3 v Derbyshire
Jonathan Doidge
BBC Radio Leeds cricket commentator
It's been an excellent Joe Root sort of an innings.
He's just taken his time, kept the scoreboard ticking, put the ball away and it is an 125th first-class 50, of which he has gone on to convert 43 into hundreds.
It's not bad. Well played Joe.
Hants 151, Surrey 25-2
Kevan James
BBC Radio Solent commentator
This game is alive.
Ollie Pope is out for 13. Make a note of that because that does not happen very often, especially at The Oval.
It is important that Hampshire get amongst the wickets and that is an absolutely huge wicket.
Yorks 276-3 v Derbys
Looks as though those spectators who've turned up to watch Joe Root and Harry Brook in action for Yorkshire might have to be patient as the players are off now for bad light.
So they'll go for tea now with Root on 65 and Brook purring along nicely with 44 not out from 37 balls against the Derbyshire attack.
It's also tea at Grace Road, where Northamptonshire are well placed on 242-3 against hosts Leicestershire.
Middlesex 203 v Gloucestershire
Middlesex are all out at Bristol.
Marchant de Lange has now earned his sixth wicket - in the same over as his fifth. Figures of 6-49 off 16 overs. A superb effort.
Josh De Caires, who made 37 off 77 balls, top scored for Middlesex.
Ethan Bamber was left stranded on 1, after Henry Brookes was caught and bowled by Graeme van Buuren to end the innings.