Play has ended for the day. Please click the links below to read the match reports.
BBC Radio Nottingham's Dave Bracegirdle at Trent Bridge:
"Hampshire fought hard to remain in contention on the second afternoon of their match against Nottinghamshire.
"Liam Dawson top-scored with 69 as the visitors reached tea, still 106 runs behind. He put on 70 with Sean Ervine, but the partnership was eventually broken by Samit Patel, who celebrated news of his England Test call-up by dismissing Ervine for 32.
"With only one batting point secured so far, Hampshire’s First Division survival hopes remain alive, providing they now go on and win and Sussex lose to Yorkshire at Headingley."
BBC Coventry & Warwickshire's Clive Eakin at Taunton:
"It was an appropriately high point in the game with which Somerset confirmed their First Division status for another season.
"The seventh bonus point needed was claimed when young left-arm spinner Jack Leach took two wickets in two balls to complete a personal five-wicket haul
"It’s been an astonishing collapse for Warwickshire. For the second time this season they’ve lost five wickets on the same score going from 105-1 to 105-6, with Ian Bell among the men out for 12."
BBC Radio Gloucestershire's Bob Hunt at Bristol:
"Gloucestershire's batsmen seem to be moving serenely towards saving the follow-on.
"After losing Will Tavare and Gareth Roderick early on, Chris Dent and Hamish Marshall have put on 133 for the fourth wicket, with Dent on 76."
BBC Radio Northampton's Alex Winter at The Oval:
"Kumar Sangakkara has once again showed his class with a lovely innings this afternoon, bringing up a fifth Championship century of the season, a delight to watch.
"But Northants will be fairly pleased with the way they have chipped away."
Nottinghamshire, 340, Hampshire 234-8 at Trent Bridge
Somerset 438, Warwickshire 114-6 at Taunton - Somerset safe from relegation
Middlesex 98, Worcestershire 322-3 at New Road
Yorkshire 251, Sussex 248 at Headingley
Leicestershire 329, Derbyshire 241-4 at Derby
Essex 225-4 v Lancashire at Chelmsford
Glamorgan 433, Gloucestershire 163-2 at Bristol
Surrey 268-6 v Northants at The Oval
Tom Fell passed 1,000 Championship runs for the summer as Worcestershire tightened their grip on the game against Middlesex at New Road.
Fell was just six runs short of a century at lunch, with his side already 93 runs in front, having shared an unbroken partnership of 81 with Tom Kohler-Cadmore (38 not out).
Having lost the opening day to bad weather, Surrey's progress was checked by an excellent spell from paceman Maurice Chambers at The Oval.
Chambers removed openers Arul Harinath and Rory Burns for figures of 2-21, with Ben Foakes bowled by spinner Graeme White with the final ball of the morning.
Kumar Sangakkara remains, however, on 22 not out at the interval, having received his county cap this morning.
Champions Yorkshire fought back strongly on the second morning at Headingley after losing their final three wickets for 10 runs at the start of play.
Jack Brooks took 2-26 with the new ball and there was a wicket each for Ryan Sidebottom, Tim Bresnan and Liam Plunkett to bring Michael Yardy to the crease in his final match for the visitors.
BBC Somerset's Anthony Gibson at Taunton:
"Somerset duly secured their fifth batting point, but not before surviving a mini-crisis, as four wickets fell in the first five overs of the day, including those of James Hildreth, who failed to add to his overnight 118, and Luke Ronchi, who raced to his first 50 for Somerset, then got himself out.
"At 377-9, cool heads were required, and Jamie Overton and Jack Leach supplied them, taking their side past the 400 mark and on to 438, in a partnership of 61, before Overton was lbw to Jeetan Patel for 40.
"Warwickshire's openers, Varun Chopra and Ian Westwood, looked in no trouble at all, as they reached 21-0 at lunch."
BBC Radio Nottingham's Dave Bracegirdle at Trent Bridge:
"Hampshire’s hopes of remaining in the First Division hang by a thread after a poor session on the second morning of their match against Nottinghamshire.
"The relegation-threatened visitors seem a long way from picking up the victory they need after reaching lunch still 227 runs behind the home side’s first innings total, and needing to reach 400 for maximum batting points.
"Having lost their nightwatchman on the first evening, Hants were rocked by a clinical eight over spell from Harry Gurney, which brought him the wickets of Jimmy Adams, Will Smith and James Vince."
BBC Radio Manchester's Scott Read at Chelmsford:
"James Anderson and Glen Chapple put on a masterclass of new-ball bowling to reduce Essex to 29-3 in the 12th over before Ravi Bopara and Jesse Ryder fought back to make the morning session pretty even.
"The duel between Anderson and England captain Alastair Cook didn't last long, in fact it took the Lancashire pace bowler just two deliveries to remove the Essex opener to disappoint an expectant crowd and press box."
Ben Salter compiled an unbeaten half-century as Derbyshire made a solid start in reply to Leicestershire's first-innings total.
Billy Godleman was lbw to Rob Taylor after an opening stand of 59 and Ollie Freckingham bowled Chesney Hughes with his first delivery, but Slater was 59 not out at the interval, having hit a six and six fours.
BBC Radio Wales Sport's Nick Webb at Bristol:
"Glamorgan batsman Aneurin Donald fell just two runs short of becoming the county's youngest ever Championship centurion as he became one of four victims for James Fuller.
"Gloucestershire claimed six wickets for 95 on day two as Benny Howell cleaned up the last three to fall, with both sides taking maximum bonus points from the innings."
Commentaries available on this page: (scroll through the live coverage tab to select your game)
All matches to start at 10:30 BSTFull scorecards available here
Nottinghamshire v Hampshire - BBC Radio Nottingham
Somerset v Warwickshire - BBC Radio Bristol/ BBC Somerset
Worcestershire v Middlesex - BBC Hereford and Worcester
Yorkshire v Sussex - BBC Radio Leeds
Derbyshire v Leicestershire - BBC Radio Derby
Essex v Lancashire - BBC Essex
Gloucestershire v Glamorgan - BBC Radio Bristol
Surrey v Northants - BBC London 94.9