Eight fixtures in Round Five of the season
Essex, Hants & Sussex all bowled out before tea
Durham & Derbyshire only two counties not playing in this round
James Anderson plays first game of season for Lancashire
Middlesex 168-6 v Gloucs
Middlesex batsman Robbie White goes to his fourth half-century of the season at Lord's with a couple of boundaries through the off side.
Can he convert it into a maiden first-class ton?
It may feel like winter, but Lord's head groundsman Karl McDermott has still cracked out the shorts.
And he's carrying three brooms.
Tough breed are groundsmen.
Image source, Getty Images
Clarke c Wheater b Snater 15 (Nottinghamshire 77-3 v Essex 99)
Adam Wheater takes a terrific catch diving across to his right to dismiss Joe Clarke.
Shane Snater claims a second wicket as Clarke plays a flashy drive at that one.
Notts still 22 behind.
Middlesex 158-6 v Gloucs
Martin Andersson has just been dismissed for 20 by Matt Taylor.
Group Two leaders Gloucestershire are enjoying a good day with the ball in the capital.
Yates c Cox b D'Oliveira 104 (Warwickshire 224-5 v Worcestershire)
Rob Yates finally departs after another fine century.
Brett D'Oliveira forces him to fine edge an attempted late cut into the gloves of Ben Cox.
Yorkshire v Kent 206-5
Yorkshire keep on making timely breakthroughs.
Part-time medium-pacer Harry Brook has just taken his third first-class wicket, having Jack Leaning caught at slip for 47.
Still nicely in the balance at Headingley.
Nottinghamshire 61-2 v Essex 99
Image source, Rex FeaturesHaseeb Hameed mixing up his shot selection perfectly at the moment.
Plenty of well-judged leaves and them some sumptious drives through the offside when the chance presents itself.
He's 42 not out now as Nottinghamshire move towards parity.
Hampshire 79 v Somerset 60-3
Somerset skipper Tom Abell crashes a pull shot off Kyle Abbott for four to move him to 22 not out.
That makes him the highest-scoring batsman of the day from either side.
Rain showers that brought early tea intervals in both Nottingham and the Ageas Bowl have now passed.
They've resumed in the evening sessions of both of those so far low-scoring affairs that if they get all the remaining overs in, are set for a couple of late finishes today.
Northants 60-4 v Sussex 106
Wicket number 14 of the day has just fallen at Wantage Road and it's a third for Sussex paceman Ollie Robinson.
The 27-year-old bowls Luke Procter for 13 and has figures of 3-23. Surely Sussex can't sneak a first-innings lead?
Harris lbw b Virdi 101 (Leicestershire 208-2 v Surrey)
All over for Marcus Harris after that maiden Leicestershire ton.
Amar Virdi pins him leg before with some nice bowling around the wicket to the left-hander.
Surrey finally manage to break the second-wicket stand of 195 after plenty of hard work.
Middlesex 140-5 v Gloucs
Robbie White has been gluing Middlesex's innings together in the middle-order this season and he appears to be doing so again.
The right-hander is up to 38 as he approaches a fourth half-century of the campaign.
Leicestershire 207-1 v Surrey
Image source, Rex FeaturesOne Leicestershire century is scored and another is completed in quick succession.
Sam Evans follows Marcus Harris' example in this tremendous second-wicket partnership worth 194.
It's Evans third century in the past three matches and his second this season against Surrey. It's taken him 198 balls and included 15 fours.
Well batted!
Leicestershire 203-1 v Surrey
Image source, Rex FeaturesMarcus Harris scores his first century in a Leicestershire shirt.
The Australia Test opener gets there off 185 balls and he's struck 15 fours.
There's a couple of toots of a horn from spectators who've been watching this knock from the balconies of some houses that overlook Grce Road.
Nice touch for the Foxes faithful!
Warwickshire 209-4 v Worcestershire
Another moment to remember for Warwickshire opener Rob Yates as he registers his second century in as many home games this season.
He follows up his ton against Essex with one here against Worcestershire that's come from exactly 200 balls and included 14 fours.
A fine spell of form for the promising left-hander.
Nottinghamshire 55-2 v Essex 99
They were just over an over away from reaching the tea interval which they will take now that some heavier rain has blown in across the East Midlands.
Notts 55-2 and are 44 runs behind. Joe Clarke survived a tough chance that he edged to Nick Browne at third slip a few overs ago.
Haseeb Hameed meanwhile looks promising so far on 36 not out.
Northamptonshire 49-3 v Sussex 106
Adrian Harms
BBC Sussex at Northampton
Thirteen wickets have fallen in the 53 overs bowled so far today, and with another 41 due to be bowled after tea, Sussex could well find themselves batting again today!
As it stands Northants have their noses in front, and Sussex may well regret dropping the obdurate Luke Procter just before tea.
Ollie Robinson has enjoyed a good day so far top-scoring with 49 not out and taking two wickets. But the bowling honours have been shared by 40-year-old Gareth Berg and Ben Sanderson both of who bowled splendidly taking five wickets each.
Middlesex 117-5 v Gloucestershire
Kevin Hand
BBC Radio London at Lord's
Image source, Getty ImagesGloucestershire have a tight grip on proceedings with both the wickets column and the scoring rate well under control at tea on day one.
Middlesex have been progressing at just over two an over throughout and with three wickets falling in the afternoon, the visitors aren't giving an under pressure batting line up an inch.
The hosts' captain Peter Handscomb was the first to go after lunch - bowled without offering a shot - while Nick Gubbins nicked-off midway through and John Simpson was pinned by what would be the last ball of the session (pictured above).
Robbie White is not out on 25 has three fifties in his last three matches but has yet to bring up his maiden ton - how Middlesex could do with him reaching the milestone here.
The overheads have been a mix of sun and rain and the ball has swung, and seamed on a pitch with a greenish tinge, throughout but the accuracy of the Gloucestershire attack has been relentless.
Lancashire v Glamorgan 111-2
They're off again at Old Trafford as another shower sweeps in.
Group 1:
Trent Bridge: Nottinghamshire 45-2 v Essex 99 - Nottinghamshire won toss and elected to bowl first
Edgbaston: Warwickshire 198-4 v Worcestershire - Worcestershire won toss and elected to bowl first
Group 2:
Ageas Bowl: Hampshire 79 v Somerset 41-3 - Somerset won toss and elected to bowl first
Grace Road: Leicestershire 192-1 v Surrey - Leicestershire won toss and elected to bat first
Lord's: Middlesex 117-5 v Gloucestershire - Gloucestershire won toss and elected to bowl first
Group 3:
Old Trafford: Lancashire v Glamorgan 109-2 - Glamorgan won toss and elected to bat first
Northampton: Northamptonshire 48-3 v Sussex 106 - Northants won toss and elected to bowl first
Headingley: Yorkshire v Kent 155-4 -Yorkshire won toss and elected to bowl first
And you can see the full scorecards from all those matches on this page.