And our final match of day one comes to a close with Sussex in a strong position.
They will resume on Monday just 108 runs behind with nine wickets in hand.
Things drawing to a close
Derbyshire 191 v Sussex 79-1
So, just the one game left in the late evening sunshine at Derby, where Sussex are batting with two overs left.
Ed Joyce has moved to 37 after Chris Nash fell for the same score.
HUNDRED FOR JOE CLARKE & STUMPS
Worcestershire 343-2 v Glamorgan
Worcestershire teenager Joe Clarke brings up a deserved century just before the close in Cardiff.
The visitors have absolutely dominated with the bat with Brett D'Oliveira also unbeaten on 152.
Close of play at Canterbury
Gloucestershire 296-9 v Kent
Gloucestershire who were 14-4, have fought back magnificently thanks to Hamish Marshall's century and Jack Taylor's 52.
Stumps at Grace Road
Leicestershire 311-5 v Northants
A fine day for Leicestershire with the bat comes to an end. Northants bowled an astonishing 60 extras to help the hosts along.
Close of play at Headingley
Yorkshire 15-0 v Surrey 330
It's also over in Yorkshire, where the hosts have played out the final two overs unscathed.
A fine comeback from the reigning county champions after Surrey were 264-4 at one point in the evening session.
Getty ImagesCopyright: Getty Images
Day one over at Edgbaston
Warwickshire 27-2 v Somerset 295
Umpires are removing the bails everywhere. Jonathan Trott and Varun Chopra survive the final three overs after those couple of quick wickets for Somerset.
Close of play at Lord's
Nottinghamshire 345-7 v Middlesex
Nottinghamshire's Samit Patel goes to the dressing room unbeaten on 86, with Brett Hutton on 21.
Their fifty partnership late in the day has just tilted things back in favour of Notts you'd have to say.
Stumps at Old Trafford
Lancashire 157-1 v Hampshire 109
And there's a close of play that couldn't have come quick enough for Hampshire.
After being bowled out for 109, Lancashire have rubbed salt into the wound with the bat and already built a lead of 48 with nine wickets in hand.
Haseeb Hameed (41 not out) and Luke Procter (48 not out) to resume in the morning.
Warwickshire two-down
Warwickshire 15-2 v Somerset 295
Nightwatchman Boyd Rankin can't survive until the close thanks to a magnificent catch by James Hildreth at short-leg off Craig Overton.
Jonathan Trott comes to the middle with two overs left.
SURREY ARE BOWLED OUT
Surrey 330 v Yorkshire
Jack Brooks picks up the final Surrey wicket as Ravi Rampaul edges him behind to Jonny Bairstow.
Really good session for the reigning county champions after tea, picking up six wickets.
WICKET Westwood (lbw b Gregory 3)
Warwickshire 6-1 v Somerset 295
Somerset do have the early breakthrough they wanted at Edgbaston as Ian Westwood goes lbw to Lewis Gregory.
How many leg-before decisions is that today? I've lost count.
'No reason for Hampshire to be cheerful'
Lancashire 146-1 v Hampshire 109
BBC Sport's Stephan Shemilt at Old Trafford:
"On a sunny evening in Manchester, it really likes summer has arrived. That's no reason for Hampshire to be cheerful, with the visitors being driven into the dirt.
"Haseeb Hameed and Luke Proctor have watchfully taken Lancs past Hampshire's 109 and beyond, with the Red Rose looking set for a springboard from which to launch tomorrow."
Worcestershire's young guns
Worcestershire 290-2 v Glamorgan
Brett D'Oliveira and Joe Clarke are absolutely pummeling Glamorgan.
The pair's third-wicket stand is now worth 156 with D'Oliveira on 136 and 19-year-old Clarke on 72.
Very encouraging signs for Steve Rhodes' side.
It's sunny
Nottinghamshire 312-7 v Middlesex
This scene from Lord's has been a familiar one up and down the country today. Glorious is not the word!
Getty ImagesCopyright: Getty Images
Get Involved at #bbccricket
Yep, it's been a topsy-turvy old day out there Ciaran. Still plenty of time for some late drama.
Somerset 295 all out
Here's BBC WM's Mike Taylor's thoughts on proceedings at Edgbaston...
No Willey hat-trick
Surrey 313-8 v Yorkshire
Ravi Rampaul survives David Willey's hat-trick delivery. As you were.
Live Reporting
Gary Smee
All times stated are UK
Get involved
Getty ImagesCopyright: Getty Images 
Getty ImagesCopyright: Getty Images 
Getty ImagesCopyright: Getty Images
Latest PostStumps - day one
County Championship
So, we are finally at the end of an early May day which could well have been mid-July. Time to cool off me thinks.
Thanks for your company today.
We'll be back on Monday from 10:55 BST with live text updates and ball-by-ball commentary from all eight County Championship matches.
I hope you can join us then. For now, enjoy the rest of your evening. Goodbye.
Close of play scores
County Championship - day one
Here's how day one ended up...
Division One:
Lancashire 157-1 v Hampshire 109
Middlesex v Nottinghamshire 345-7
Warwickshire 27-2 v Somerset 295
Yorkshire 15-0 v Surrey 330
Division Two:
Derbyshire 191 v Sussex 83-1
Glamorgan v Worcestershire 343-2
Kent v Gloucestershire 296-9
Leicestershire 311-5 v Northants
Click here for full scorecards.
Close of play at Derby
Derbyshire 191 v Sussex 83-1
And our final match of day one comes to a close with Sussex in a strong position.
They will resume on Monday just 108 runs behind with nine wickets in hand.
Things drawing to a close
Derbyshire 191 v Sussex 79-1
So, just the one game left in the late evening sunshine at Derby, where Sussex are batting with two overs left.
Ed Joyce has moved to 37 after Chris Nash fell for the same score.
HUNDRED FOR JOE CLARKE & STUMPS
Worcestershire 343-2 v Glamorgan
Worcestershire teenager Joe Clarke brings up a deserved century just before the close in Cardiff.
The visitors have absolutely dominated with the bat with Brett D'Oliveira also unbeaten on 152.
Close of play at Canterbury
Gloucestershire 296-9 v Kent
Gloucestershire who were 14-4, have fought back magnificently thanks to Hamish Marshall's century and Jack Taylor's 52.
Stumps at Grace Road
Leicestershire 311-5 v Northants
A fine day for Leicestershire with the bat comes to an end. Northants bowled an astonishing 60 extras to help the hosts along.
Close of play at Headingley
Yorkshire 15-0 v Surrey 330
It's also over in Yorkshire, where the hosts have played out the final two overs unscathed.
A fine comeback from the reigning county champions after Surrey were 264-4 at one point in the evening session.
Day one over at Edgbaston
Warwickshire 27-2 v Somerset 295
Umpires are removing the bails everywhere. Jonathan Trott and Varun Chopra survive the final three overs after those couple of quick wickets for Somerset.
Close of play at Lord's
Nottinghamshire 345-7 v Middlesex
Nottinghamshire's Samit Patel goes to the dressing room unbeaten on 86, with Brett Hutton on 21.
Their fifty partnership late in the day has just tilted things back in favour of Notts you'd have to say.
Stumps at Old Trafford
Lancashire 157-1 v Hampshire 109
And there's a close of play that couldn't have come quick enough for Hampshire.
After being bowled out for 109, Lancashire have rubbed salt into the wound with the bat and already built a lead of 48 with nine wickets in hand.
Haseeb Hameed (41 not out) and Luke Procter (48 not out) to resume in the morning.
Warwickshire two-down
Warwickshire 15-2 v Somerset 295
Nightwatchman Boyd Rankin can't survive until the close thanks to a magnificent catch by James Hildreth at short-leg off Craig Overton.
Jonathan Trott comes to the middle with two overs left.
SURREY ARE BOWLED OUT
Surrey 330 v Yorkshire
Jack Brooks picks up the final Surrey wicket as Ravi Rampaul edges him behind to Jonny Bairstow.
Really good session for the reigning county champions after tea, picking up six wickets.
WICKET Westwood (lbw b Gregory 3)
Warwickshire 6-1 v Somerset 295
Somerset do have the early breakthrough they wanted at Edgbaston as Ian Westwood goes lbw to Lewis Gregory.
How many leg-before decisions is that today? I've lost count.
'No reason for Hampshire to be cheerful'
Lancashire 146-1 v Hampshire 109
BBC Sport's Stephan Shemilt at Old Trafford:
"On a sunny evening in Manchester, it really likes summer has arrived. That's no reason for Hampshire to be cheerful, with the visitors being driven into the dirt.
"Haseeb Hameed and Luke Proctor have watchfully taken Lancs past Hampshire's 109 and beyond, with the Red Rose looking set for a springboard from which to launch tomorrow."
Worcestershire's young guns
Worcestershire 290-2 v Glamorgan
Brett D'Oliveira and Joe Clarke are absolutely pummeling Glamorgan.
The pair's third-wicket stand is now worth 156 with D'Oliveira on 136 and 19-year-old Clarke on 72.
Very encouraging signs for Steve Rhodes' side.
It's sunny
Nottinghamshire 312-7 v Middlesex
This scene from Lord's has been a familiar one up and down the country today. Glorious is not the word!
Get Involved at #bbccricket
Yep, it's been a topsy-turvy old day out there Ciaran. Still plenty of time for some late drama.
Somerset 295 all out
Here's BBC WM's Mike Taylor's thoughts on proceedings at Edgbaston...
No Willey hat-trick
Surrey 313-8 v Yorkshire
Ravi Rampaul survives David Willey's hat-trick delivery. As you were.