Teenager James Rew scores 221 as Somerset total 500 against Hampshire
Essex captain Tom Westley scores his third century of the season against Lancashire
Opener Rob Yates scores double hundred for Warwickshire against Kent
Lyndon James takes 6-74 for Notts and Will Young hits a debut century against Surrey
Alex Lees scores third hundred in successive Championship innings for Durham
Yorkshire opener Finlay Bean scores third 100 of season in game against Worcestershire at New Road
Derbyshire's George Scrimshaw claims maiden five-for in Sussex's 402 all out at Hove.
Middlesex 277 v Northants 219 & 15-0 - trail by 43
Close call for Emilio Gay, who edges Helm just wide of the slips and down to third man for a single.
He moves on to three.
Vasconcelos picks up a couple more runs, nudged to backward square.
Surrey 355 v Notts 168-2
Three slips in for new batter Joe Clarke, but he runs the final ball of Jordan Clark's latest over safely past them for four down to third man.
Will Young is 67 not out at the other end.
Kent 171 v Warwickshire 532-7
Two maximums in six balls from Henry Brookes have taken the lead past 350 and taken him to 39 from 30 balls.
Rob Yates is opening up like a flower in spring too, his 22nd four, carved away off Jack Leaning, takes him to 220* and a reverse sweep of the next ball also reaches the rope. Just like that Bears lead by 361.
Kent fans are looking to the heavens, desperate for rain. Not sure they're going to get any.
Durham 280-4 v Glos 316
Lees and Clark are back in the middle.
Shaw will bowl to Lees.
Middlesex 277 v Northants 219 & 10-0 - trail by 48
Roland-Jones is really hitting the mark here with a metronomic line and length just outside off.
Just two runs from the over - and there are 22 left tonight.
Lancs v Essex 275-5
No joy yet for Lancashire with the new ball.
Will Williams sends down a maiden to Tom Westley after Simon Harmer square cut Tom Bailey for four in the previous over.
Durham 280-4 v Glos 316
The rain clouds have gone and sunshine has returned to bathe the Riverside ground.
We're just waiting for the last cover to come off.
Not long now. In theory at least, 32.2 overs left.
Kent 171 v Warwickshire 505-7
Rob Yates picks up an attempted yorker from Joey Evison for a one-bounce four to take his side past 500.
Henry Brookes hoiks the final ball of Evison's over to the Lime Tree at deep mid-wicket for a maximum to take the lead up to 340.
These two are putting their foot down.
Middlesex 277 v Northants 219 & 8-0 - trail by 50
Maiden over from Middlesex captain Roland-Jones.
Tom Helm will bowl down the hill to Emilio Gay and the first ball is legside and whipped away for a single.
Shot! Back of a length, a bit of width and Vasco is on the back foot, driving through cover for four.
A play and a miss to the next ball as the opener is stuck on the crease.
Three more whipped through the leg side.
Surrey 355 v Notts 161-2
Image source, Rex FeaturesThey've hard to work very hard for it, but Surrey have their second success at The Oval.
Nottinghamshire's captain departs, pushing forward and edging to Dom Sibley at first slip, after a stand of 134 with Will Young.
Yorkshire 376-7 v Worcestershire
Good news for Worcestershire paceman Adam Finch.
Ths magic sponge has obviously done the trick - and having been helped off barely ten minutes before, he has now trotted back onto the field of play.
Just as well. 32 overs still left in the day after this one.
Kent 171 v Warwickshire 489-7
The second double-ton of the Division One afternoon. This one from Rob Yates was very different but no less impressive in a different way to that of James Rew.
A lesson in patience and grit. Rob Yates resumed this morning on 53 and has dug deep to reach his maiden double-ton from 402 balls with a push through the covers off Hamid Qadri.
There were 19 fours and that destructive straight six which smashed up the Kent balcony along the way, but, Yates is going to Yates, he defends the next ball respectfully.
The lead is 318. What an effort.
Surrey 355 v Notts 155-1
Deja vu at The Oval as Dan Worrall angles the ball into Will Young's pads and he flicks it away with a turn of the wrists for four.
The New Zealander is 61 not out and Haseeb Hameed has 66 at the other end.
Middlesex 277 v Northants 219 & 0-0
Here comes Ricardo Vasconcelos and Emilio Gay.
Toby Roland-Jones will bowl to Vasco.
Somerset 500 v Hampshire 39-1
Nick Gubbins let it be known he did not want to be out there as a shower hits Taunton. After 120 overs in the dirt he wants a sit down.
There's blue sky to the west so it's hopefully not terminal for the day's play.
Sussex 402 v Derbyshire 150-3
That's a fraction wide from Jack Carson and Brooke Guest cuts it away for a single to bring up a 141-ball 50 - only his second of the season.
Durham 280-4 v Glos 316
Ed Seabourne
BBC Radio Bristol
It appears I'm not the only one to be surprised by the rain...
"Where's that come from?"
Glamorgan 0-0 v Leicestershire
The umpires have inspected again and *whisper it quietly we are going to have more play at Sophia Gardens.
They will complete the first over of the game at 5.30pm, to be followed by 16 more - unless the rain has other ideas.
Durham 280-4 v Glos 316
Still 33 overs left here tonight.
Josh Shaw bowls a half volley and Lees drives beautifully through mid off for four runs.
He's 160 not out now - and that's a career best.
Hmm. Rain in the air, I'm afraid. And we're off. That came very suddenly.
Lancs v Essex 261-5
New ball time at Stanley Park and it hasn't come a moment too soon for Lancashire.
Essex were 50-4 earlier in the day but Tom Westley, aided and abetted by Paul Walter, has batted them into a healthy position.
Tom Bailey will start a new spell. Simon Harmer is on strike.