Somerset slump to 87-7 after Notts total 448 in their first innings
Lancashire 100-1 at stumps, replying to Warwickshire's 371 all out
Yorkshire earn 80-run first-innings lead over Hampshire at the Ageas Bowl
18 teams split into three divisions of six depending on placings earlier in season
Winners of Division One will be crowned county champions after four rounds of matches
Hampshire v Yorkshire 203-7
Dom Bess picks up his first run of the morning to advance to 46 not out then Matthew Fisher takes a blow on the hand from a ball by Brad Wheal. He is ok to carry on despite the jarred fingers.
Somerset v Nottinghamshire 304-6
A third batting point is quickly brought up by Nottinghamshire with some lovely strokeplay from Liam Patterson-White and Tom Moores.
Patterson-White could have been taken though, although it would have taken a superb catch from Somerset captain Tom Abell at second slip after he had slashed at one off Josh Davey.
Gloucestershire v Northamptonshire 232-5
We spoke too soon in suggesting there would be eight prompt starts.
There has been no action yet at the County Ground in Bristol because of rain.
Adam Rossington (66) and Harry Gouldstone (32) are the not out Northants batsmen in this Division Two fixture.
Hampshire v Yorkshire 200-7
Matthew Fisher is the new Yorkshire batsman following Jordan Thompson's early exit (see 11:01 entry). He clips Brad Wheal through square leg for three runs and there is a first batting point for the visitors.
They need as many as they can get in this innings, having started the match 16.5 behind Warwickshire on 'carry forward'.
Somerset v Nottinghamshire 286-6
The first scoring shot of the day at Taunton brings up a half-century for Liam Patterson-White.
A glorious straight drive off Josh Davey takes him to 50 off 44 balls with ten fours for his third half-century of the Championship season.
Hampshire v Yorkshire 197-7
Two balls is all it takes at the Ageas Bowl.
Brad Wheal angles one across Jordan Thompson, who tries to leave it alone, but doesn't lift the bat in time and deflects it down into his stumps.
You can only imagine what is going through his head. Probably most of it is in asterisks.
Looks like we have eight prompt starts. Where will the first wicket fall?
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Image source, BBC SportSomerset v Nottinghamshire 282-6 - play resumes at 11.00 BST
A fascinating first day at Taunton ended with Nottinghamshire just about on top thanks to an unbroken seventh wicket stand of 74 between Tom Moores and Liam Patterson-White.
As so often, the first hour or so will be crucial to the outcome of the match. If Notts push on towards 350, having been asked to bat, they will pile the pressure on Somerset.
But if the home attack can quickly bundle out the remaining four wickets and their batsmen can then lay the foundations for a good total, the pressure will switch back to the visitors.
A quick reminder that teams have carried points forward into this second phase of the Championship. Here's the total for each team.
Division One:
Warwickshire 21, Somerset 18.5, Lancashire 16.5, Hampshire 8.5, Nottinghamshire 5, Yorkshire 4.5.
Division Two:
Essex 19, Northants 16, Surrey 13, Gloucestershire 12, Glamorgan 11.5, Durham 4.
Division Three:
Worcestershire 18.5, Middlesex 13, Sussex 12, Leicestershire 11.5, Kent 11, Derbyshire 9.5.
Lancashire v Warwickshire 259-3 - play resumes at 11.00 BST
Yesterday was one of hard graft for little reward for Lancashire as Chris Benjamin and Sam Hain made excellent hundreds for Warwickshire.
But it's a new day for everyone and Lancs will hope to make big inroads under grey skies with the new ball still only seven overs old.
This was my view on the walk to the office this morning, with preparations well under way for day two.
Image source, Twitter/AdamLaniganHampshire v Yorkshire 197-6 - play resumes at 11:00 BST
Image source, Rex FeaturesYorkshire's Dom Bess hailed the tenacity shown by their batting line-up following a tough opening day against Hampshire at the Ageas Bowl.
The White Rose county managed a scoring rate of 2.29 an over against tight Hampshire bowling, with Bess unbeaten on 45.
"I don't think the scoreboard reflects how well we've batted," the England all-rounder told BBC West Yorkshire Sport.
"It was really good grit (by us) and hopefully, if it's a bit sunnier tomorrow, we can pile on some more runs."
Looks like another cloudy one today. Here's BBC Weather's Simon King with a more detailed forecast.
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Following first day's play
Division One
Ageas Bowl: Hampshire v Yorkshire 197-6
Old Trafford: Lancashire v Warwickshire 259-3
Taunton: Somerset v Nottinghamshire 282-6
Division Two
Sophia Gardens: Glamorgan 134 v Essex 92-2
Bristol: Gloucestershire v Northamptonshire 232-5
Division Three
Leicester: Leicestershire 66-5 v Kent 232
Lord's: Middlesex 218-5 v Derbyshire
Worcester: Worcestershire v Sussex 254-9
You can see more details on all those matches on our scorecards page.
"I’m not obsessed with individual titles. I’m much more interested in being part of a team which wins trophies.”
Who said that? Yes, it was Manchester United 'new boy' Cristiano Ronaldo.
The County Championship trophy is what six teams have in their sights, and although we do not know if Ronaldo has ever visited Old Trafford, the cricket ground, leaders Warwickshire certainly enjoyed a productive start to their game there against Lancashire.
What will day two of our eight matches have in store? You've come to the right place to find out. Play starts at 11:00 BST.
Image source, Rex Features