Play has ended for the day. Click the links below to read the match reports.Durham v WorcestershireHampshire v YorkshireSussex v SomersetWarwickshire v NottinghamshireKent v GloucestershireLancashire v SurreyLeicestershire v EssexNorthants v Glamorgan
BBC Somerset's Anthony Gibson at Hove:
"The wicket of Ed Joyce, caught down the leg side off Jamie Overton off the last ball before tea for a well-made 83, turned what had been an evenly-balanced session very definitely Somerset's way.
"In between the showers, their seamers had plugged away, picking up the wickets of Chris Nash and Luke Wright, both neatly caught by Marcus Trescothick in the slips, but it was the extra pace of Overton that first unsettled the Sussex captain and then removed him. What a difference genuine pace can make!"
BBC Radio Leeds' Dave Callaghan at the Ageas Bowl:
"It has been an even contest so far between relegation-threatened Hampshire and champions Yorkshire.
"At 55-0 at lunch, Hampshire were reasonably happy, but two wickets went down quickly in the afternoon as Jack Brooks accounted for Michael Carberry and James Vince was clean bowled by Tim Bresnan.
"Jimmy Adams went to a patient half century before falling to Steven Patterson in a tight spell and although rain intervened on two occasions, it was only for short periods."
BBC Radio Manchester's Scott Read at Old Trafford: "Jimmy Anderson bowling to Kumar Sangakkara one highlight of what's been an engrossing day's play so far at Old Trafford.
"The England bowler was brought straight back into the attack when the Sri Lankan batsman came out to the middle and he was tempted into a driving Anderson who found the outside edge. The game feels about level at tea."
There will be no play on day one of the County Championship Division One match between Warwickshire and Nottinghamshire at Edgbaston, or the Division Two game between Leicestershire and Essex at Grace Road.
The umpires took the decision to abandon play at both grounds shortly before 15:00 BST.
BBC Newcastle's Martin Emmerson at Chester-le-Street: "It's been a slow morning with Worcestershire reaching 67-1 at lunch after being put into bat.
"They have not won on this ground but need to win their last two to have any chance of staying up. Defeat for Durham would see them losing five in a row at home for the first time.
"The only wicket to fall was that of Brett D'Oliviera who went lbw to home debutant Barry McCarthy for 36."
BBC Somerset's Anthony Gibson at Hove:
"Ed Joyce must have thought hard before deciding to bat after winning the toss, on a day of sharp showers and strong winds, with 12 overs lost to the weather already.
"In the event, the conditions didn't offer much help to the Somerset seamers, with two loose shots accounting for Luke Wells and Matt Machan.
"Joyce (36no) was put down in the slips on 23 - a lapse which Somerset may live to regret on what looks like a decent pitch."
There has been no play before lunch at four of the eight Championship matches.
The games affected are Warwickshire v Nottinghamshire, Northants v Glamorgan, Leicestershire v Essex and Kent v Gloucestershire.
BBC Radio Solent's Kevan James at the Ageas Bowl:
"Heavy overnight rain prevented play from starting till 11:00am and Yorkshire have bowled steadily on a greenish wicket.
"But Jimmy Adams (22no) and Michael Carberry (27no) have used their considerable experience to see Hampshire to the break unscathed, although the run rate is very slow."
Commentaries available on this page: (scroll through the live coverage tab to select your game)
Rain delays for several matchesFull scorecards available here
Lancashire v Surrey - BBC Radio Lancashire, BBC Radio Manchester and Radio 5 live sports extra
Durham v Worcestershire - BBC Newcastle
Hampshire v Yorkshire - BBC Radio Solent
Sussex v Somerset - BBC Radio Sussex
Warwickshire v Nottinghamshire - BBC Coventry and Warwickshire and BBC WM 95.6
Kent v Gloucestershire - BBC Radio Kent
Leicestershire v Essex- BBC Radio Leicester
Northants v Glamorgan - BBC Radio Northampton