Click here for exclusive match highlights from every day's play, latest scores, reports, news and interviews during the LV= County Championship campaignEvening Session
6:52pm - Yorkshire are dismissed for 177, with Steven Patterson bowled by Stokes for seven, to give Durham, for whom Onions returned 5-63, a first-innings lead of 60.
Buttler has made it through to the close at Taunton and will need a further 10 runs to reach a hundred tomorrow.
Petersen, Buttler, Wells and Onions have been among the stand-out performers on a throughly entertaining day, although Jimmy Adams arguably outshone all with his unbeaten double-century.
Here's a round-up of all the scores from across the country:
Yorkshire are 177 all out in reply to Durham`s 237 at the Emirates Durham ICG.Nottinghamshire are 325 for five at Derby and lead Derbyshire by 69 runs.Sussex are 204 for two replying to Surrey's 351 at the Kia Oval.Somerset are 358 for six against Warwickshire at Taunton.
Lancashire are 43 for two replying to Kent's 244 at Emirates Old Trafford.Gloucestershire are 34 for one in their second innings at Bristol, trailing Northamptonshire by 178 runs.Worcestershire are 159 for five replying to Hampshire’s 500 for nine declared at the Ageas Bowl.
6:33pm - Warwickshire have made the most of their return to the middle with Chris Woakeshaving Peter Trego caught behind by a leaping Tim Ambrose.
Durham will be very happy with their day’s work as Sidebottom has now gone for 11, caught by Keaton Jennings off Stokes.
6:29pm - Worcestershire still have a lot of work to do tomorrow as they finish on 159 for five. That means the game at Emirates Old Trafford, where Lancashire are 36 for two off 30 overs, is the only place you will find live action in Division Two.
There are a handful of overs left at Taunton and the Emirates Durham ICG...
6:25pm - Anderson is taking guard due to Horton’s dismissal, bowled by Matt Coles for 15.
The players have returned to the field at Taunton, with the light having improved, while Plunkett and Sidebottom are stemming the tide against Durham.
6:23pm - Ed Joyce reached his half-century moments before stumps with Sussex finishing on 204 for two, in most part thanks to Wells’ unbeaten 108.
The bails have also been lifted at Derby, where Taylor and Read have reached the end of the day’s play unbeaten with the visitors 69 runs ahead.
Gloucestershire still trail by 178 runs at the close of play at Bristol and Jimmy Anderson is striding to the crease at Emirates Old Trafford...
6:12pm - Wells has taken kindly to part-time off-spinner Vikram Solanki’s introduction, bringing up his personal milestone with two fours in three balls. That’s his third hundred in as many appearances against Surrey.
Lancashire are making steady progress after a lengthy rain delay earlier in the day. Paul Horton and Karl Brown remain unbeaten in response to Kent’s 244.
6:01pm - Petersen has enjoyed a wonderful day at Taunton, where bad light has delayed proceedings, and another batsman, Sussex left-hander Wells, is closing in on a ton at the Kia Oval.
Liam Plunkett strides out to the middle in the familiar surroundings of the Emirates Durham ICG after Adil Rashid was out lbw to Ben Stokes. Tim Bresnan edges Chris Rushworth to Paul Collingwood soon after to leave sorry Yorkshire in real trouble.
James Tomlinson has claimed the prized wicket of Moeen, caught by Liam Dawson at second slip for 55.
5:50pm - A sharp catch from Rikki Clarke at second slip has brought to an end Petersen’s fine innings. The South African right-hander made 136 without offering Warwickshire a chance prior to his dismissal. Chris Wright’s second wicket of the afternoon also ends the 193-run partnership between Petersen and Buttler, who remains unbeaten on 81.
@OptaJim on Twitter: Northamptonshire's number 11 @copes9 has scored 347 runs in his last 8 first-class innings at an average of 58.16. Depth.
5:42pm - Riki Wessels has edged Ross Whiteley behind on eight to present Tom Poynton with his second catch of the day, bringing Chris Read to the crease.
Moeen Ali is offering valuable resistance for Worcestershire, with his third half-century in as many games, as the visitors attempt to reduce the deficit imposed by Hampshire’s 500 for nine declared. Daryl Mitchell’s side are 129 for four.
5:37pm - In addition to Onions’ assault against Yorkshire, wickets also continue to fall at the Ageas Bowl where Alexei Kervezee has been ousted for a run-a-ball 11, Danny Briggs taking the catch off David Balcombe.
Gloucestershire opener Michael Klinger is out for just one as Northamptonshire make an early breakthrough, while James Taylor has passed 50 at Derby.
5:28pm - Gary Ballance has nicked off to Phil Mustard for five at the Emirates Durham ICG meaning Onions has completed his five-wicket haul. Yorkshire are reeling at 107 for six and showing no signs of an improved batting display.
At the Ageas Bowl, Thilan Samaraweera has been unable to achieve a repeat performance of his 79 at Glamorgan last week, falling to Chris Wood for 11.
@derbyshireccc on Twitter: _Wicket! Samit Patel slips midwicket and is run out by Billy Godleman's throw for 48. Notts 275-4 after 94 overs (Taylor 53*).
5:14pm - Will Gidman has brought Northamptonshire’s fun to an end with his fourth wicket, Crook finally dismissed from 53 from 79 balls, caught at midwicket by Chris Dent. The visitors will be delighted to finish with a lead of 212, very well placed after a flourishing wag of their tail.
Onions is single-handedly running through Yorkshire’s middle-order with Jonny Bairstow now back in the pavilion for 16, caught by Mark Stoneman.
Somerset have a third batting bonus point, with Petersen and Buttler continuing to plunder Warwickshire’s toiling attack.
5:01pm - At what point do Northants flip their batting order around? After their incredible showings last week, 10 and Jack are delivering again. Steven Crook and Trent Copeland, having hit 88 not out and 70 respectively versus Essex, have so far put on 45, with the former passing 50. That means the last two wickets have yielded 120 so far, only a little short of their 228 last time out! As if their efforts were not impressive enough, they have also secured their side a fifth and final batting bonus point.
Some bad news for Yorkshire fans, though: Joe Root has departed one shy of a half-century, Graham Onions claiming his third scalp. Well, fourth if you count his run-out of Phil Jaques!
In Division One, Luke Wells has ticked along to 69 as Sussex reach 127 for two, while Nottinghamshire have moved into the lead versus Derbyshire.
4:43pm - Good news from Emirates Old Trafford: play will restart at 5:30pm. Buttler, meanwhile, has moved beyond 50; this evening could be fun with him and Petersen at the crease, though maybe not so much if you're a Warwickshire fan.
In Division Two, Worcestershire's reply to Hampshire's imposing total has been further undermined by Matthew Pardoe departing to James Tomlinson.
4:34pm - What a start Alviro Petersen has made to his Somerset career! He's just reached three figures from just 128 balls, and what an innings it has been to watch. Jos Buttler, another who has enjoyed a positive beginning to the campaign, is three from a fifty.
4:24pm - Northamptonshire have lost James Middlebrook for 62 but remain in an extremely strong position at 371 for nine - a lead of 179 - against Gloucestershire. At Emirates Old Trafford, the rain has stopped and a further inspection will take place in six minutes.
@DurhamCricket on Twitter: The players are out on the field and we should be underway any minute.Afternoon Session
4pm - Just as it looked as though Sussex were in the ascendancy at the Kia Oval, they have been pegged back as Yardy falls for a patient 23 caught by Rory Burns off Gareth Batty. The visitors are 100 for two.
Petersen continues to accumulate runs at a canter, closing in on his hundred while also bringing up the century partnership for the fifth wicket with Buttler as Somerset take control.
With tea being taken at Derby and a murky Emirates Old Trafford, here are the current scores from across the country.
No play at the Emirates Durham ICG where Yorkshire are 57 for three in reply to Durham`s 237.Nottinghamshire are 206 for three at the County Ground, where Derbyshire were all out for 256.Sussex are 100 for two replying to Surrey's 351 at the Kia Oval.Somerset are 251 for four against Warwickshire at Taunton.
No play in the afternoon session at Emirates Old Trafford where Lancashire are 22 for one replying to Kent's 244.Northamptonshire are 353 for eight replying to Gloucestershire`s 192 at Bristol.Worcestershire are 51 for one replying to Hampshire’s 500 for nine declared at the Ageas Bowl.
3:34pm - James Middlebrook has raised his bat at Bristol after reaching his second half-century of the season. The 35-year-old all-rounder made 70 in Northamptonshire’s first game at Glamorgan and has continued his good form against Gloucestershire. The visitors’ lower order is providing invaluable runs at the moment with Steven Crook offering useful support in a 60-run ninth-wicket partnership.
3:31pm - Lumb has been dismissed for 44 at Derby with Samit Patel the next man in. Wicketkeeper Tom Poynton took the catch off Jonathan Clare with the away side 70 runs behind.
Wells has brought up his half-century for Sussex, which featured six fours, coming off 120 balls.
Somerset pair Petersen and Buttler continue to regain the initiative at Taunton having shaken hands on their 50-run partnership and the covers are off at the Emirates Durham ICG.
3:18pm - Worcestershire’s progress has been hit by the departure of Mitchell, who has been caught in the slips off David Balcombe for 18.
Wells and Yardy have taken their stand beyond 50 at the Kia Oval, where Sussex are now 73 for one from 38 overs.
@DurhamCricket on Twitter: We're hopeful of getting underway at quarter past 4, if there is no more rain.
3:04pm - It is fair to say Worcestershire needed a good start with the bat after conceding 500 runs to Hampshire. They have made solid progress so far, with Mitchell and Pardoe seeing off the new ball.
Petersen has moved past 50 at Taunton, and a very fine innings it has been too. The South African has looked in wonderful touch, which is hardly surprising given he made 167 and 91 on Somerset debut at the Kia Oval last week.
At Bristol, David Payne has struck twice in an over to give Gloucestershire a welcome boost. The departures of David Murphy and David Willey have left Northants 283 for eight in reply to the hosts’ 192 all out.
2:50pm - Jos Buttler is looking in good touch with two early fours in his innings as he looks to mount Somerset’s recovery alongside Petersen.
Lumb is closing in on Nottinghamshire’s third half-century of their innings, with the visitors now trailing by less than 100 with eight wickets still remaining.
The pitch inspection at the Emirates Durham ICG is due at 3pm.
2:31pm - Warwickshire have made further inroads at Taunton with Wright now among the wickets. Craig Kieswetter was in the middle for almost half an hour before nicking off to Rikki Clarke at second slip for a 17-ball duck. After an opening stand of 103, Somerset have since lost four wickets for 40 runs.
Sussex are making steady progress against Surrey with Luke Wells and Mike Yardy buidling a handy second-wicket partnership.
Matthew Pardoe and Daryl Mitchell stride to the crease to begin Worcestershire’s response at the Ageas Bowl. Moeen Ali finished with figures of 4-103 for the visitors. A couple of stats from Adams’ double ton - it was his highest score in almost seven years and the second highest of his career.
2:20pm - Hampshire promptly declared after reaching 500 for nine at the Rose Bowl. Captain Adams made an unbeaten 219 in over eight hours at the crease, a sensational innings which included 29 fours.
Alviro Petersen has planted Woakes over the fence at Taunton. Although not in total control of the shot, the South African connected enough to clear Chris Wright on the backward square-leg boundary.
Hales has failed to build on his fifty, falling lbw for 56 off Tony Palladino.
Gloucestershire have taken their second wicket of the afternoon session with Gidman claiming his third victim, Alex Wakely falling lbw 12 runs shorts of a century.
2:04pm - James Hildreth has been dismissed for five at Taunton, spooning an attempted pull shot off Woakes into the grateful hands of Ateeq Javid.
Moeen Ali has taken his fourth wicket, removing Danny Briggs’ middle stump. The England spinner made 25 with Jimmy Adams still unbeaten at the other end.
Hales has brought up his first half-century of the summer, reaching the milestone off 139 balls.
1:54pm - Chris Tremlett will be looking to make an impression straight away after lunch at the Kia Oval, still looking for his first wicket of the day.
Fellow England seamer Chris Woakes, meanwhile, is hoping to continue Warwickshire’s fightback at Taunton where Jim Troughton has just climbed into the stands to move the sightscreens, enjoying a quick sit down in the process.
Will Gidman has trapped Andrew Hall lbw for 28 at Bristol to slow Northamptonshire’s efforts to build a healthy first-innings lead.
1:44pm - Still no sign of play at the Emirates Durham ICG and there is now also a slight delay at Emirates Old Trafford. Thankfully, we’re back under way at all five of the other grounds.
Alex Hales and Michael Lumb are the men tasked with continuing Nottinghamshire’s promising start at Derby. Ed Cowan’s innings was brought to an end by Dominic Cork’s son Greg, on the field as substitute fielder, who took the catch at midwicket.Morning Session
1:06pm - Marcus Trescothick departs, lbw to Jeetan Patel, on the stroke of lunch, while Nick Compton falls likewise to Rikki Clarke after moving past 50 - albeit having inside edged it. Surrey have also broke through against Sussex, Tim Linley getting rid of Chris Nash for 11.
In Division Two, Hampshire's Jimmy Adams continues his fine effort and becomes the LV= County Championship season's first double-centurion versus Worcestershire. Elsewhere, Kent's Darren Stevens has broke through to oust Lancashire's Luke Procter.
We have reached the intervals all over the country and here are the scores:
Yorkshire are 57 for three in reply to Durham`s 237 at the Emirates Durham ICG.Nottinghamshire are 124 for one at the County Ground, where Derbyshire were all out for 256.Sussex are 22 for one replying to Surrey's 351 at the Kia Oval.Somerset are 113 for two against Warwickshire at Taunton.
Lancashire are 22 for one replying to Kent's 244 at Old Trafford.Northamptonshire are 226 for four replying to Gloucestershire`s 192 at Bristol.Hampshire are 473 for eight versus Worcestershire at the Ageas Bowl.
12:51pm - Well, Somerset are absolutely flying at Taunton. Trescothick has brought up his 99th first-class half-century in 85 balls, taking his side to 97 without loss. Nick Compton, meanwhile, is also approaching the landmark on the back of some glorious strokes. If you want to watch it, tune in on SkySports 1.
12:40pm - Hampshire, who earlier moved beyond 400 within 110 overs to claim a fifth batting point, have lost Chris Wood, for 41, and David Balcombe in quick succession, Daryl Mitchell and Richard Jones claiming the wickets. Wakely did reach his fifty for Northants, by the way, and has moved quickly on to 74.
Derbyshire have also got a breakthrough on the back of Ed Cowan chipping David Wainwright to midwicket, but Nottinghamshire remain 104 for one.
12:21pm - It’s the Benny Howell Show at Bristol; well, not quite, but he has taken the morning’s first wicket by having Rob Newton taken at backward point for 39. Northamptonshire have subsequently reached 176 for four, Alex Wakely 48 not out.
Someone who has already reached his half-century is Ed Cowan, leaving Notts to 81 without loss replying to Derbyshire’s 251. Elsewhere in Division One, a further statistic from the Kia Oval: all of the wickets were taken by former Surrey players in Jordan, Steve Magoffin and James Anyon.
11:57am - What an excellent morning it's been for Chris Jordan, who continues his fine start to the season by ending with figures of 5-92 on his return to the Kia Oval. Surrey are subsequently dismissed for 351, Chris Tremlett striking 34.
It's still raining heavily in the north-east, where an early lunch will be taken, but play is set to resume in three minutes at Emirates Old Trafford.
11:46am - Loud appeals at Taunton, where Marcus Trescothick appeared to edge Chris Woakes behind. Umpire Martin Saggers was unmoved and Somerset are 33 without loss after 11 overs.
11:36am - Sussex's Chris Jordan is shining against former side Surrey, ousting Gareth Batty to leave the hosts 338 for eight at the Kia Oval.
However, there is bad news from Emirates Old Trafford, where play has stopped with Lancashire none without loss after one over versus Kent. As you may have guessed, it's raining.
11:21am - And he has another! Anderson finishes with figures of 4-57 as Kent are dismissed for 244, James Tredwell last to depart for 40.
11:15am - It took James Anderson a little while to find his first wicket yesterday, but he is having no such trouble today. Almost immediately, the England paceman bowls Mark Davies to leave Kent 219 for nine against Lancashire. There is no play, however, at the Emirates Durham ICG due to rain.Pre-Play News
10:55am - One side not playing this week is Glamorgan, for whom Michael Reed has starred this season. But why not read our exclusive interview with the seamer?
10:46am - Yesterday's action was certainly enthralling, though it did little to suggest which way games are headed. Indeed, many are very much in the balance and set up beautifully - particularly those in Division One.
Here is a reminder of the scores:
Yorkshire are 57 for three in reply to Durham`s 237 at the Emirates Durham ICG.Nottinghamshire are 28 without loss at the County Ground, where Derbyshire were all out for 256.Surrey are 301 for seven against Sussex at the Kia Oval.
Kent are 216 for eight in their clash with Lancashire at Old Trafford.Northamptonshire are 107 for three replying to Gloucestershire`s 192 at Bristol.Hampshire are 367 for six versus Worcestershire at the Ageas Bowl.
10:35am - Hello and welcome to ecb.co.uk's live coverage of the LV= County Championship action. We're now into the third round of games, with today representing the second day of four for the 12 sides in action yesterday. We also have a game beginning; Somerset are facing Warwickshire at Taunton, the hosts having won the toss and opted to bat.
Want to know what's happening at your county? Interested in how your rivals are faring? Look no further than ecb.co.uk's county-by-county page