Nine County Championship games
18 counties split into three groups
Middlesex bowl out Surrey for 154 at Lord's before closing on 114-3
England Test captain Joe Root out for five for Yorkshire
Vilas lbw Klaassen 53 (Kent v Lancashire 187-5)
Lancashire skipper Dane Vilas brings-up the 100 partnership with Josh Bohannon...then promptly departs.
It was a very important knock from the captain, who joined the action with his team wobbling on 85-4.
Bohannon is still there on 59 not out.
Libby c Moores b Fletcher 117 (Worcs 216-6 v Notts)
Jake Libby goes and the Worcestershire collapse/Notts fightback continues at New Road.
The Pears opener snicks Luke Fletcher behind and is on his way for 117.
Worcestershire have fallen from 140-0 to 216-6.
Warwickshire v Essex 186-4
England and Warwickshire paceman Olly Stone has picked up a wicket with just the second ball after tea at Edgbaston.
Nick Browne edges behind for 68 and it breaks a fourth-wicket partnership of 114 with Paul Walter.
Other games are starting to get under way after tea now.
All the drama is at Lord's though, where Middlesex and Surrey are involved in a low-scoring thriller.
Handscomb b Topley 0 (Middlesex 16-3 v Surrey 154)
Reece Topley is on fire for Surrey!
The England paceman cleans up Middlesex's new captain Peter Handscomb without scoring.
Middlesex are 16-3 and in all sorts of bother. Topley has all three.
Image source, Getty ImagesGubbins b Topley 4 (Middlesex 16-2 v Surrey 154)
Wicket number 12 in little over two sessions at Lord's.
Nick Gubbins tries to clip left-armer Reece Topley away but doesn't make any contact and is bowled.
Topley has 2-7.
Northants v Glamorgan 226-6 - tea, day one
Nick Webb
BBC Radio Wales
The teams head into the final session still evenly matched at Northampton as two wickets in two balls for left-arm spinner Saif Zaib halted the Glamorgan advance.
Kiran Carlson reached a fluent half-century, cover-driving beautifully, before being yorked by Zaib who next ball removed the off-bail of Callum Taylor.
Northants looked in control when debutant Wayne Parnell had Billy Root lbw for 13 just after lunch, before Carlson and captain Chris Cooke compiled a hundred stand to put Glamorgan briefly on top.
Cooke started cautiously but has started to hit his stride as he reached 50 off 81 balls, with his side looking as though they need 300 on a decent track.
Sussex 40-0 v Yorkshire 150 - tea, day one
Adrian Harms
BBC Sussex
A very good session for Sussex, who wrapped up the four remaining Yorkshire wickets and then reached tea 40-0.
The wickets were shared around the Sussex bowlers, who all bowled well, and were handled and rotated well by skipper Ben Brown.
This looks like a good pitch, and at this stage Yorkshire having won the toss will feel there score is well below par
Leics 167-6 v Somerset - tea, day one
Anthony Gibson
BBC Somerset
The Somerset bowlers have had to work hard for their wickets in an attritional afternoon session in which the pitch seems to be losing some of its life under the influence of strong spring sunshine.
After Craig Overton had bounced out Harry Swindells, Lewis Hill and Ben Mike added 59 for the sixth wicket, the stand broken by Jack Leach's very first ball, as he pinned Mike lbw.
But Hill is still there, with a fourth consecutive 50 under his belt, batting neatly and positively.
Middlesex 8-1 v Surrey 154
Just what the doctor ordered for Surrey after their first-innings batting collapse.
Reece Topley has just removed Middlesex opener Max Holden thanks to a sharp catch at slip by captain Rory Burns.
Group One
Group Two
Group Three
It's tea everywhere now, except at Lord's where they're into the final session, so probably a good time to have a look at the latest scores...
Sussex 40-0 v Yorkshire 150
It's not improved a lot for Yorkshire this afternoon.
After being bowled out for 150, they have failed to get a wicket in Sussex's response, as Tom Haines (27*) and Aaron Thomason (13*) make it through to tea unscathed.
Durham 203-3 v Derbyshire - tea, day one
Martin Emmerson
BBC Radio Newcastle
Derbyshire must be kicking themselves for not running out David Bedingham when they had the chance. But he survived that drama when he was on one and now has 100. It's often the way, isn't it?
This was his second of the season following his career-best 180* in the opening game at Trent Bridge. Today's century came in 143 balls and 15 fours.
Jack Burnham, who has lots of unfulfilled promise has reached 50. It came in 69 balls and included five fours. He often gets carried away, as he did with Simon Harmer last week and paid the price then.
When Matt Critchley returned with some leg spin this afternoon Burnham again looked excited but after a scare Bedingham had a word with him and he calmed down again. He has timed his cover drives well though. Can he go on to join his partner in three figures? He's only recorded the one century so far
Durham are 203-3 and these two have put on 95 to bring them a first batting point. They were 7-2 earlier this morning. We're now at tea. Burnham has 54 and Bedingham 106.
Leics 162-6 v Somerset
Leicestershire's Lewis Hill is in the form of his life right now.
The 30-year-old goes to his fourth successive Championship half-century following scores of 70 and 69 not out against Surrey and 65 against Hampshire.
More importantly he's helped his side recover from 74-5 against Somerset.
Kent v Lancashire 177-4
Josh Bohannon has taken his time to get to a much-needed half-century for Lancashire, with his fifth-wicket partnership with Dane Vilas adding almost 100 runs to their total.
Middlesex 0-0 v Surrey 154
Sam Robson and Max Holden get Middlesex's first innings going after tea.
Will wickets continue to tumble at Lord's?
Northants v Glamorgan 213-6
Northants have broken the Kiran Carlson/Chris Cooke partnership and it's all down to some superb bowling from Saif Zaib.
The spinner has only just been brought into the action but makes an immediate impact by clean-bowling Carlson before doing the same to new man Callum Taylor with his next ball.
A couple of wonderful deliveries which completely deceived the batsmen to give Northants a huge boost ahead of tea.
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Runs flowing in the afternoon sunshine then for most teams. Not for Surrey or Yorkshire, mind.
Image source, Getty Images
Durham 191-3 v Derbyshire
And there's the second century of this third round of County Championship fixtures in quick succession.
Durham batsman David Bedingham brings up his three figures off just 143 balls to put his side in a strong position at Chester-le-Street.