Essex chase 196 to beat Sussex in South group thriller
Rain denies Somerset win over Warwickshire at wet Edgbaston
Also in Central group, Worcestershire beat Northants by 78 runs
James Fuller takes hat-trick as Hampshire defeat Surrey at Arundel
Leicestershire draw with Durham as rain ends one-innings game
All 18 counties split into three regional groups of six
Each side will play five games
Two teams with most points contest five-day final
A lot happened in the final few minutes of the morning session at Arundel - but Hampshire's James Fuller may need to add a second bat to be taken seriously as a juggler.
Image source, Getty ImagesGlamorgan 113 & 92-4 Gloucestershire 181 - lunch
Nick Webb
BBC Sport Wales
Glamorgan are in a precarious position at lunch as they lead Gloucestershire by just 27 runs with six wickets in hand.
The wicket of top scorer Nick Selman for 55, trapped lbw by Ryan Higgins just as he started to accelerate before lunch, gave the visitors an important boost.
Charlie Hemphrey and Kiran Carlson went early on to Matt Taylor, while Billy Root hit a couple of elegant drives before falling to David Payne for 13.
The Gloucestershire seamers are still well-placed to force victory with 64 overs left in the match.
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Durham 291-8 dec & forfeit v Leics forfeit & 60-1 - lunch
Martin Emmerson
BBC Newcastle
We could be in for an exciting finish at Grace Road after Durham declared their first innings on 291-8 to leave Leicestershire 82 overs to chase 292.
The match has been badly affected by the weather, with more than two days lost and Durham still in their first innings on the fourth morning.
But some declaration bowling, which included a first wicket for Hassan Azad, helped them reach a total they were happy to declare on.
Both sides then forfeited an innings to set up a run chase. Brydon Carse took his revenge when he bowled Azad for 19 with his first ball of the day, but Harry Dearden has 16 and Sam Evans 19 at the interval.
Image source, Rex FeaturesNorthants 212 & 28-0 v Worcs 219 & 255-6 dec
Worcestershire declared too late last week - might they have declared too early this week?
Northants have shown a bit of ambition since being put back in by the Pears' declaration.
Ricardo Vasconcelos, alongside Ben Curran (pictured), has crunched a few boundaries to take them to 28 without loss at lunch to set up an intriguing afternoon session at Wantage Road.
Image source, Getty ImagesYorkshire 400-6 dec v Derbyshire 198-6
No play so far, but the umpires will take another look at 13:30.
Sussex 194 & 120-7 v Essex 140 - lunch
Lunch will be tasting that much better for Essex after Simon Harmer removes George Garton with the final ball of the morning.
The left-hander offers no stroke but the ball doesn't turn as much as he hoped it would and he is leg-before.
Harmer now has 3-43 - and 26 wickets in the BWT. Sussex lead by 174, but there could still be a tight finish in this one.
Middlesex 269 & 34-0 v Kent 191
Right, where haven't we checked in for a while - okay, Canterbury, where Middlesex need to put stacks on runs on the board in a couple of hours then declare and try to bowl Kent out.
Seems unlikely, doesn't it? But they are already up to 34-0 at lunch, which is a lead of 112 overall thanks to their first-innings advantage.
Max Holden has hit a run-a-ball 22 and Sam Robson is unbeaten on 11. If Holden keeps that rate up, they have a sniff. Kent, meanwhile, need wickets and lots of them.
North group
Yorkshire 400-6 dec v Derbyshire 198-6
Nottinghamshire 472 v Lancashire 173 & 2-0
Durham 291-8 dec & forfeit v Leicestershire forfeit & 60-1
Central group
Warwickshire 121 & 138-7 v Somerset 413-9 dec
Worcestershire 219 & 255-6 dec v Northamptonshire 212 & 28-0
Glamorgan 116 & 92-4 v Gloucestershire 181
South group
Sussex 194 & 120-7 v Essex 140
Middlesex 269 & 34-0 v Kent 191
Surrey 172 v Hampshire 258-7
Holland b Dunn 6 (Surrey 172 v Hampshire 258-7)
It's a house of cards at Arundel - and nothing to do with Sir Franics Urquhart.
Ian Holland plays a 'nothing shot' to a ball from Matt Dunn which again cuts back of the seam and flattens his off stump.
And with that, it's lunch.Hampshire lead by 86.
Notts 472 v Lancashire 173 & 2-0 - lunch
Bad light shaves a few minutes off the morning session at Trent Bridge and Lancashire won't have any complaints about that.
The pressure is all on the Red Rose boys after being forced to follow-on, but at least they didn't lose a wicket in that mini-session just before lunch.
Alex Davies is two not out and Keaton Jennings has yet to score.
Thomason c Walter b Quinn 13 (Sussex 194 & 119-6 v Essex 140)
Aaron Thomason bangs the back of his bat in anger after clipping a leg-stump delivery from Matt Quinn to mid-wicket.
Sussex lead by 173 - but have only four wickets left.
Delray Rawlins is still there, having had to temerity to slog two sixes off spinner Simon Harmer.
Selman lbw b Higgins 55 (Glamorgan 116 & 92-4 v Glos 181)
Image source, Getty ImagesAn important half-century from Glamorgan opener Nick Selman is keeping the Gloucestershire wolves from the door at Sophia Gardens.
But just as I write that, he's gone! Plumb lbw to Ryan Higgins. And that's lunch. Potentially a big turning point for Glos there.
Glamorgan lead by 27 with six wickets remaining - they are going to need to build that cushion a bit more or Gloucestershire will fancy a chase of 100-150 for sure.
Although it's just started raining in Cardiff apparently...
Fuller lbw Dunn 1 (Surrey 172 v Hampshire 250-6)
Hampshire have their second batting point at Arundel but that's three gone in the space of five balls.
After two wickets by Amar Virdi in the previous over, Matt Dunn starts a new one by cutting one back off the seam and winning an lbw decision against James Fuller.
Tom Fell 108no (Worcs 219 & 255-6 dec v Northants 212 & 19-0)
Godzilla Kong: I might be wrong, but I think that's Tom Fell's first FC century since his battles with cancer. Well batted young man.
Not sure about the Twitter handle but the sentiments are admirable. And you are correct - it is Fell's first first-class ton since 2015 according to Cricket Archive.
Warks 121 & 138-7 v Somerset 413-9 dec
Persistent drizzle in Birmingham has persuaded the umpires to take an early lunch.
Somerset will be saying their prayers for better weather this afternoon before tucking in - they need just three more wickets to strengthen their hold on top spot in the Central Group.
Alsop c Borthwick b Virdi 87 (Surrey 172 v Hampshire 249-5)
Amar Virdi claims his third wicket of the innings as Tom Alsop flashes and Scott Borthwick takes a sharp catch at first slip.
The Hampshire batsman isn't happy with his execution of the stroke and puts his hand on top of his helmet in anguish.
Two balls later and it's four for Virdi as Harry Came, on 12, misses a reverse sweep and is leg-before.
Hampshire lead by 77 as Lewis McManus joins James Fuller.
Notts 472 v Lancashire 173 & 0-0
Lancashire have 67 overs to face if they are to escape from this 'home game' at Trent Bridge with a draw.
The first is a maiden by Peter Trego to Keaton Jennings.
No spectators allowed at Hove - but maybe some have found a way around the rule.
Image source, Rex FeaturesSurrey 172 v Hampshire 241-3
In among all the comings and goings, they snuck back out at Arundel, and Hampshire are heading towards a second batting point.
Tom Alsop brought up a fifty partnership with Harry Came by forcing Scott Borthwick away through the covers for three.
Worcs 219 & 255-6 dec v Northants 212
Image source, Getty ImagesWorcestershire were accused of declaring too late in last week's draw with Glamorgan - it seems they are not going to risk making the same mistake again.
Tom Fell finishes unbeaten on 110, alongside Ed Barnard on 48 not out, as the Pears declare with a lead of 262.
Challenge firmly laid down to Northants at Wantage Road - with every outcome still possible, this could be a thriller.