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Dane Vilas hits 124 and Luke Wells 97 as Lancashire build a big lead against Middlesex.
Nottinghamshire close on 177-5 after following on against Kent at Canterbury.
No play possible on day three at Edgbaston between Warwickshire and Northamptonshire.
Sussex declare on 344-9. Leicestershire close on 221-3, chasing 499 to win.
Glamorgan close on 120-2 after following on against Yorkshire in Cardiff.
Derbyshire close on 398-9 in reply to Gloucestershire's 377 at rain-hit Bristol.
Sussex 262 & 344-9 dec v Leicestershire 108 & 100-2
Colin Ackermann dances down to Jack Carson and hits it just over Henry Crocombe's head at mid-on.
It gets him a tenth four and brings up his half-century - his sixth of the season.
Kent 446 v Notts 265 & 76-3
A lucky break for Joe Clark, who edges Yuzvendra Chahal through first and second slip for two runs to move to five.
Matthew Montgomery appears to have edged Evison through slip at the other end but that ball has missed everything and gone for three byes.
Notts staring down the barrel here.
Kent have an excellent chance to leapfrog Middlesex with a handy lead in the Division One table.
Lancashire 224-4 v Middlesex 194
Would you believe it?!
Luke Wells is three runs short of his second ton of the season and he advances down the wicket to Jayant Yadav.
He gets an inside edge and it's caught by John Simpson, who swiftly removes the bails.
It's given as caught on the scorecard and it's a first wicket of the day for Middlesex.
Sussex 262 & 344-9 dec v Leicestershire 108 & 92-2
Jack Carson begins his first over of the Leicestershire second innings.
He is the sixth Sussex bowler used and possibly a sign of how nicely Rishi Patel and Colin Ackermann have been batting.
Carson opens with a maiden and he almost has Ackermann caught and bowled.
Sussex would be thrilled to break this stand before tea.
Northants 250, Warwickshire 142-4
The covers are being rolled off in Birmingham.
The skies overhead are still a fairly ugly grey but it is now dry, at least.
It has stopped raining - and umpires Bailey and Pratt have even been out for an "unofficial inspection".
Some of the more discerning locals are now predicting that we will actually see some cricket today.
Glos 377 v Derbys 368-8
Leus du Plooy is down the track to Dom Goodman, thrashing the ball through mid off for one to keep the strike.
This is only Mark Watt's sixth first-class innings and Leus du Plooy is closing in on a fourth Championship century of the season.
He move to 87 with a single steered into mid wicket off Zafar Gohar.
Mark Watt drives to long on for one. Another single for du Plooy and Watt launches the last ball down long on for four.
Lancashire 212-3 v Middlesex 194
The first hour has not gone at all well for Middlesex.
They have shipped 76 runs off 15 overs and there are now two well-set batters at the crease.
With Kent needing seven Nottinghamshire wickets for an innings victory, things are looking bleak.
Kent 446 v Notts 265 & 68-3 f/o
Matthew Montgomery is forward to defend against Joey Evison.
The batter picks up one with a nudge to the leg side.
Montgomery picks up a single off Yuzvendra Chahal and Joe Clarke shoulders arms to see out the over.
Glos 377 v Derbys 357-8
Got him this time!
After missing a difficult chance when Alex Thomson was on 16, Miles Hammond seizes a catching chance at deep square leg as the batter miscues a short ball from Dom Goodman.
The Derbyshire number 10 is Mark Watt.
Glos 377 v Derbys 355-7
Ollie Price is in the attack and Alex Thomson greets his second ball with a drive through cover for four.
He picks up a single off the fifth ball and takes Derbyshire to 350 with a pull to fine leg off Dom Goodman.
Leus du Plooy moves to 83 with a flashing drive through point for four.
Lancashire 200-3 v Middlesex 194
Luke Wells and Dane Vilas easily accumulate five more runs off Jayant Yadav's latest over.
Lancashire's 200 is up and this fourth-wicket stand is now worth 104.
Middlesex have not had a good first 55 minutes of play.
Kent 446 v Notts 265 & 64-3
Two wickets in the over!
It's a soft dismissal as Ben Slater holes out to a Joey Evison half tracker and slaps a cross-batted catch to Michael Hogan on the leg side.
Matthew Montgomery is in next and Notts have two batters in with one run between them and a big innings deficit.
Lancashire 195-3 v Middlesex 194
Dane Vilas slog sweeps Josh de Caires for six and then runs a single out to deep cover off the next ball.
That takes Lancashire into a first innings lead.
Kent 446 v Notts 265 & 63-2 f/o
Yuzvendra Chahal is bowling with two slips and Steven Mullaney will keep the strike with a back foot slap though point for one.
Two slips are also in for Joey Evison at the other end.
Out! Joey Evison drops short and Steven Mullaney launches the ball to the substitute fielder Arafat Bhuiyan at deep square leg.
Joe Clarke is in next.
Sussex 262 & 344-9 dec v Leicestershire 108 & 70-2
Leicestershire's best batters are at the crease and they reach their half-century stand.
Rishi Patel and Colin Ackermann are making batting look a bit more comfortable in the mid-afternoon by the sea.
Lancashire 182-3 v Middlesex 194
Jayant Yadav changes ends and Dane Vilas sweeps one behind square to reach his half-century.
Only a second 50 of the season for the South African.
He is retiring from first-class cricket at the end of the month, so he will want one final big score.
Yorkshire 500, Glamorgan 273 & 0-1
Ben Coad strikes third ball.
Zain ul Hassan is caught at slip.
And, following on, Glamorgan are already a man down in their second innings.
Colin Ingram is the new man in to join Eddie Byrom.
A wicket maiden for Coad.
Glos 377 v Derbys 336-7
Oh dear.
A slice of luck for Derbyshire as Alex Thomson pulls the ball round the corner and the chance is spilled by Miles Hammond at square leg.
The ball goes through his legs for a fortuitous four runs.
A low chance diving forward. Not easy at all - but a chance.
Frustration builds for Gloucestershire.
Lancashire 181-3 v Middlesex 194
After some poor stuff from Jayant Yadav, Josh de Caires is thrown the ball.
Remember he has taken 12 wickets in his last three innings, including this one.
And he starts with a rank full toss!
De Caires overcompensates with the next, dropping way short and Dane Vilas helps himself to four more, pulling it away.
Vilas then gets two more out into the deep, before grabbing a single.
11 off De Caires' first over of the day.
Sussex 262 & 344-9 dec v Leicestershire 108 & 54-2
Rishi Patel runs one down to the vacant third man boundary to collect his fourth four.
A better spell for the Foxes batters.