Adam Hose makes career-best 266 for Worcestershire against Hampshire
Surrey's Dom Sibley and Sam Curran hit centuries against Durham
Tom Westley scores a second successive Championship century for Essex
Keaton Jennings makes 106 and Chris Green 121 for Lancashire at Chesterfield
Sam Robson hits 133 for Middlesex v Leicestershire
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Sussex v Warwickshire 355-5
Kai Smith had his heart in his mouth for a moment, clipping Gurinder Sandhu to Jack Carson at midwicket, but he can't take the catch. Did it carry? Maybe not quite.
A smidge of hope for Sussex, however, who would love a sixth wicket in the seven overs which remain this evening.
Bears have a third batting point, can Sussex find a second bowling point?
Yorks v Essex 248-3
Matt Critchley steers Matthew Revis away for a leg-side single to finish the day and that means he will resume tomorrow on 13 not out, an identical score to partner Jordan Cox.
The pair have seen Essex through to stumps after the blow of losing Tom Westley and Dean Elgar in successive overs and the visitors will be happy overall with their situation after winning the toss this morning.
Hampshire v Worcs 434-2
Image source, Rex FeaturesThis is now the highest first class score by a visiting player at the Utilita Bowl.
It'll mean so much to an Isle of Wight lad who grew up playing in the Hampshire system.
When he woke up today, Hose had one century to his name and a top score of 111.
He's more than doubled it, and may yet challenge the highest score on this ground of 311 by John Crawley 20 years ago.
Hose has 252* from 240 balls with 31 fours and six sixes.
Five overs remain in the day.
Surrey 355-3 v Durham
A classic Dom Sibley drive through midwicket brings him another boundary off Will Rhodes and takes the Surrey opener past 150.
The home side are very much on top, having been put in this morning and have just stowed away their third batting bonus point.
Kent 325-4 v Northamptonshire
Just a couple of runs from Calvin Harrison's final over of the day and Kent will be satisfied with their start against Northants.
Opener Ben Compton received his county cap at lunchtime and celebrated that, and signing a new three-year contract, with 66.
Teenager Eknash Singh fell one short of a maiden first-class 50, but Tawanda Muyeye weighed in with 58 and skipper Daniel Bell-Drummond will start day two on 66 not out.
Northants included leg-spinner Yuzvendra Chahal for the first time this season, but his 25 overs were wicketless, producing figures of 0-72.
Leics v Middx 318-4
Leus du Plooy becomes the third Middlesex batter to pass 50 today and it's a fourth half-century of the season for the stand-in captain.
Du Plooy and Ben Geddes have put together a partnership of 47 so far, following that big opening stand between Sam Robson and Josh de Caires.
Sussex v Warwickshire 346-5
Bears keeper Kai Smith, just 20, gets off the mark with a boundary off Ollie Robinson, steered to the backward point rope, though Robinson responds by beating the outside edge with the final ball of the over.
Nine overs remain in the day. The Bears need four runs for a third batting point.
Somerset 269-6 v Notts
Lyndon James comes up for another over and Tom Banton thumps his first delivery through the covers for four. It's been a tough day for the Notts attack but they have stuck to their gameplan very well.
Sussex v Warwickshire 340-5
Mike Taylor
BBC WM commentator
Sam Hain tried to flick that away the leg-side but took one liberty too many. The well-placed Tom Haines claiming a wicket that Sussex so urgently needed.
Hain was really looking to accelerate but Ollie Robinson has picked him up.
Having looked as though Sussex were really suffering until that wicket fell, now they've got an opening again.
Surrey 328-3 v Durham
Dom Sibley has really displayed his mastery of the controlled steer through the slips today - and another example, offf Matthew Potts, earns him a boundary that brings up the 50 partnership with Dan Lawrence.
Lawrence has looked lively so far, with 21 from 24 balls . while Sibley has been out there all day for his 128.
Hain c b Robinson 87 (Sussex v Warwickshire 340-5)
What a catch by Tom Haines to get rid of Sam Hain at leg gully.
Ollie Robinson has a wicket he deserves and the 151-run partnership is broken.
Hampshire v Worcs 412-2
Pick a County Championship record... it's in danger here.
Adam Hose has 242* after smoting his 30th four, to go with six sixes, and brings up the 350 stand with Jake Libby.
Glamorgan v Gloucs 267-6
A flashing square drive for four off James Harris carried James Bracey to his 50 from 101 balls faced. It's been a disciplined innings and he and Zaman Akhter have now put on 89.
Hampshire v Worcs 403-2
Worcestershire have secured more batting bonus points in the past seven hours than they did in the first eight matches of the season.
Adam Hose picks up three boundaries off a Kyle Abbott over to move to 238* from 230 deliveries before Jake Libby brings up the 400 off Scott Currie in the next over with a cover drive for four to reach 113*.
They are in with a good chance of maximum bonus points in the 10 overs which remain.
Somerset 262-6 v Notts
Dropped at first slip on two, Tom Banton makes the Division leaders pay by reaching a patient 50 from 103 balls with a nudge to third man for two runs off Brett Hutton. Only five fours in this innings so far.
Hampshire v Worcs 386-2
Adam Hose has 226* at better than a run a ball.
The partnership with Jake Libby is 327 and the Pears are rewriting their history books.
Say what you like about the Kookaburra, the deck, the weather, the bowling, but this has been an extraordinary effort.
Henry Nicholls departed for a 12-ball duck in the fourth over with the score 3-1 remember.
Surrey 320-3 v Durham
Not surprisingly, Durham have taken the option of a new ball and handed it to Matthew Potts to share with Daniel Hogg.
Potts is steered neatly past the slips by Dom Sibley for another boundary as the home side continue to advance. They'll be looking for a third batting point before stumps tonight and maybe even a fourth.
Sussex v Warwickshire 320-4
Ed Barnard brings up his half-century from 97 balls with a streaky edge off Henry Crocombe which is parried by second slip before streaking away for four.
The partnership with Sam Hain is up to 131 with Hain on 76*.
Glamorgan v Gloucs 254-6
Zaman Akhter runs James Harris down to third man for four and goes to only his second first-class 50 from just 54 balls. Gloucestershire also have a batting bonus point now and his stand with James Bracey is currently worth 79.
Kent 304-4 v Northants
Left-armer Liam Guthrie trundles in again - it's short, wide and Daniel Bell-Drummond cracks it away square for four to reach 50 off 102 balls. The Kent skipper is doing a great job for his side, now in partnership with Joey Evison (23 not out).
