Group One: Derbys v Warks, Essex v Notts, Worcs v Durham
Group Two: Leics v Glos, Somerset v Hants
Group Three: Glamorgan v Lancs, Kent v Northants, Yorks v Sussex
Glam 98-5 v Lancs 173
Lancashire just starting to turn the screw at Cardiff.
74-1 became 97-5 and it's probably now the visitors on top.
Marnus Labuschagne is still there and holds the key to Glamorgan getting on terms you feel.
Still 12 overs left, which is ridiculous.
Somerset 326-8 v Hampshire
Brilliant from Lewis Gregory.
He pulls Kyle Abbott to the boundary to bring up his century off 135 balls, including 13 fours and two sixes.
He and Roelef van der Merwe really have dug Somerset out of a hole today.
Derbys v Warks 253-7
Another man has fallen in his 70s at Derby.
Michael Burgess suffers the same fate as Sam Hain (77) before him, falling short of a century when will see on 71.
Michael Cohen is the man with the wicket.
Kent v Sussex 330-5
The second new ball has indeed done some work for Kent.
Three wickets, including both Luke Procter and Rob Keogh who were well set, have taken the edge of Northants' dominance.
Still very much the visitors' day at the moment and they'll be looking for 450.
Somerset 302-8 v Hampshire
England's Lewis Gregory is into the 90s and Somerset have third batting point.
What a remarkable turnaround this has been, to remind you, from 43-5.
Somerset 284-8 v Hampshire
Roelef van der Merwe's fun is over. Huge wicket.
He and Lewis Gregory have batted quite superbly in wrestling the momentum Somerset's way, but Van der Merwe has been run out for 88.
He struck 10 fours and three sixes in his superb 88, sharing a whopping 171 with Gregory.
Yorks v Sussex 208-5
An outstanding innings from the Sussex captain.
His side were reeling at 68-4 but a century stand with Aaron Thomason got the visitors stuck into the day.
And now Brown gets to his first hundred of the summer.
It had been a lean campaign for him until a second-innings 95 last week against Northants and he's now backed that up.
Essex v Notts 190-6
The new ball brings Essex another wicket. Sam Cook removes Tom Moores for 12.
Glam 74-3 v Yorks 173
Two wickets in two balls from Tom Bailey has got Lancashire back into the game at Cardiff.
The hosts had reduced the deficit into double figures only one down but now have work to do to get ahead.
Leics 304-4 v Glos
This is a really great day for Leicestershire to back up that tremendous run chase against Middlesex on Sunday.
But Marcus Harris has now gone for 148 - criminally in the over before the second new ball is due.
Gloucestershire have an end open now for the new ball.
But a cracking effort again from Harris after his 185.
Essex v Notts 180-5
Like Lyndon James before him, Steve Mullaney has fallen shortly after reaching his fifty.
Two really important wickets for Essex with both of those batsmen well placed to go on and get really big scores.
Kent v Northants 306-2
Kent have managed to claw back the scoring rate a little - it was over five-an-over earlier in the day, now below four for the first time - but but only have two wickets.
Second new ball is due and they need to strike with it to get back into the day.
Luke Procter, on 77, and Rob Keogh, 37, are taking Northants further along.
Somerset 244-7 v Hampshire
They're back on at Taunton, where it's brightened up a bit.
There's still another 29 overs scheduled to be played there.
Derbys v Warks 222-6
Derbyshire continue to chip away against Warwickshire and now Tim Bresnan departs for 17, dismissed by Alex Hughes.
Somerset 244-7 v Hampshire
It's not been as sunny as it was yesterday across the UK, but I still wasn't expecting to be typing this so early into the afternoon.
They've gone off for bad light at Taunton.
Derbyshire v Warks 210-5
Michael Burgess has brought up his half-century from 89 balls, including five fours.
He and Tim Bresnan continue to build for Warwickshire.
Yorks v Sussex 178-5
A fine fourth-wicket stand for Sussex has ended at 107.
Aaron Thomason gone for 40.
A second debutant walks out now for Sussex in Danial Ibrahim.
Essex v Notts 172-4
Steven Mullaney and Lyndon James were going along really nicely before tea, but the latter has been dismissed.
Peter Siddle has claimed his third wicket of the day and Nottinghamshire are four down.
Glam 38-1 v Lancs 173
It's been a really positive reply for Glamorgan and a touch concerning for Lancashire with the rate of progress.
But the visitors have an opening wicket with David Lloyd falling to Saqib Mahmood.
Marnus Labuschagne has been in dreadful form but here's another chance for the Australian.
Worcs 131 v Durham 34-1
After a solid start to their reply, Durham have lost their first wicket.
Australia international Cameron Bancroft is the man to fall for 18, dismissed by Josh Tongue.
The hosts needed that.