Surrey beat Somerset by an innings
Surrey go top of Division One - lead Somerset by 21 points
Essex lose four wickets in pursuit of 441 against Notts
Lancs set 602 to win by Worcs; Jennings scores ton
Day-night fixture at the Ageas Bowl
Hampshire make 443 to lead Yorkshire by 93
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Surrey 459 v Somerset 180 & 106-5 (f/o)
Very much Surrey's morning, with five wickets.
Lewis Gregory and James Hildreth dug in for an hour before lunch, but they still need 173 to avoid an innings defeat.
Worcestershire 247 & 484-7 dec v Lancashire 130 & 34-0
Keaton Jennings and Alex Davies stroll off for lunch having done a good job to negotiate eight overs before the interval.
Lancashire still need '568' to win, or to bat out five more sessions.
Here are the county scores going into the interval...
Division One:
Worcestershire 247 & 484-7d v Lancashire 130 & 34-0 at New Road
Surrey 459 v Somerset 180 & 106-5 (f/o) at Guildford
Essex 206 v Notts 380 & 123-5 at Chelmsford
Hampshire 245-3 v Yorks 350 at Southampton (play resumes at 14:00 BST)
Division Two:
Sussex 552 v Durham 211 & 56-1 (f/o) at Arundel
Leicestershire 427 & 56-4 v Middlesex 233 at Grace Road
Kent 197 & 446-8d v Warwks 125 & 26-0 at Tunbridge Wells
Glamorgan 283 v Derbys 293-5 at Swansea
Northants 282 v Gloucs 62 & 245-8 (f/o) (play resumes at 13:30 BST)
Essex 206 v Notts 380 & 123-5
That's lunch at Essex.
The hosts have claimed four wickets, but Billy Root and Riki Wessel's resistance before the interval has frustrated them.
Nottinghamshire lead by 297.
Image source, Rex FeaturesSurrey 459 v Somerset 180 & 103-5 (f/o)
James Hildreth and Lewis Gregory have frustrated Surrey for almost an hour now.
Hildreth has 27, Gregory 19. Surrey will be desperate for one more wicket before lunch.
They turn to teenage spinner Amar Virdi...
Essex 206 v Notts 380 & 113-5
Where's that come from?
Essex have been on top for the last hour, but Billy Root breaks the shackles by skipping down the wicket and biffing Simon Harmer for six over long off.
Notts' lead is approaching 300 - they're still favourites to win this, despite the fightback from the county champs.
Image source, Rex FeaturesKent have set Warwickshire a huge target of 519 to win at Tunbridge Wells. The visitors are 3-0.
Derbyshire have moved ahead of Glamorgan at Swansea. They're now 291-5, leading by 8, thanks in no small part to 103 from Alex Hughes.
Leicestershire have a useful lead at Grace Road, but Middlesex are pressing hard to stay in the game. The home side are 245 in front on 51-4. Mark Cosgrove was last man out, lbw to part-time bowler Max Holden for 23.
Durham are following on after a batting collapse against Sussex at Arundel. They're 304 behind on 37-1.
Northants will press for victory over Gloucestershire at Northampton when their day-night match resumes at 13:30 BST. The visitors are 245-8 following on, leading by only 25.
Worcestershire 247 & 484-7 dec v Lancashire 130 & 10-0
Lancashire are living dangerously.
Keaton Jennings is almost run out by a direct hit, but Ed Barnard misses the stumps, before Alex Davies is struck on the pad by Charlie Morris. Huge shout, not out.
15 minutes to go until lunch at New Road.
Every ball covered
BBC Radio 5 live sports extra are now broadcasting from Guildford.
It's picture perfect...
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Lancashire 9-0 (Target 602)
Love it when the counties do your job for you...
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Every ball covered
Still one of the most familiar faces on the county circuit is old Jack...
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Kent 197 & 446-8d v Warwickshire 125
519 to win! That's a mammoth target for Warwickshire, dwarfed only by, erm, Lancashire's target to beat Worcestershire at New Road.
Will Rhodes and Dominic Sibley open the innings for the visitors.
Surrey 459 v Somerset 180 & 89-5 (f/o)
James Hildreth and Lewis Gregory are digging in for Somerset.
But they still have a mammoth job to save the game at Guildford.
The deficit is 190, five and a bit sessions left.
Worcestershire 247 & 484-7 dec v Lancashire 130 & 0-0
Keaton Jennings and Alex Davies open for Lancashire.
Forget about the 602 - their first task - survive until lunch.
Sussex 552 v Durham 211 & 19-1 (f/o)
Martin Emmerson
BBC Newcastle
The talk this morning was about what the new ball could do for Sussex but how Durham needed to dig and continue to build an innings.
But from the moment Will Smith tried to sweep the fifth ball of the day from Danny Briggs through the legside it all went horribly wrong for the visitors.
It sparked a collapse of incredible proportions as they were bowled out just 9.5 overs later having lost their final six wickets for just nine runs. Stu Poynter, Josh Coughlin and Nathan Rimmington all fell to David Wiese for ducks.
The bowler took 4-4 in 30 balls. Durham were all out for just 211 and the follow-on was announced before the players were even off the pitch! They began their second innings trailing by a mammoth 341 runs.
You could suggest you write them off at your peril these days following come-backs against Leicestershire and Derbyshire in recent weeks but the task facing them now is a massive one.
Libby b Wagner 51 (Essex 206 v Notts 380 & 95-5)
The county champions are right back in this now!
Essex paceman Neil Wagner gets Jake Libby with an absolute beauty which nips back in and clatters into his leg stump.
Notts have lost their last three wickets for 12 runs, but still lead by a healthy 269.
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Glamorgan 283 v Derbyshire 275-5 (100 overs)
Nick Webb
BBC Wales Sport
Derbyshire batsman Alex Hughes led his side’s progress towards a first innings lead as he reached a century before running himself out for 103.
Hughes, averaging just 14 before the game, got to three figures off 180 balls.
Obdurate partner Billy Godleman had departed just before, leg-before to Andrew Salter for 24 with one six and a plethora of defensive shots.
With third seamer David Lloyd ruled out of fielding with a knee injury, Glamorgan opted not to take the new ball in the Swansea sunshine.
Worcestershire 247 & 484-7 dec v Lancashire 130
If Lancashire do indeed chase down 602 at New Road, it'll be the highest total to win a match in first-class history.
West Zone's 541-7 to beat South Zone in Hyderabad in 2010 is the best of all time.
Image source, Rex FeaturesWorcestershire 247 & 484-7 dec v Lancashire 130
And the declaration does indeed come!
Lancashire need 602 to win.
Or bat out five and a bit sessions. Both scenarios are pretty unlikely, it has to be said.
Durham are following on against Sussex at Arundel after a disastrous morning which saw them sink from 202-4 to 211 all out. They've already lost Cameron Steel, bowled for eight by Jofra Archer. They're 329 behind on 12-1 following on.
Warwickshire have taken two Kent wickets at Tunbridge Wells today, where the home side are 441-8 and leading by a daunting 513.
Leicestershire are batting watchfully against Middlesex at Grace Road, where they're 226 runs ahead on 32-3 after the early loss of Colin Ackermann and Harry Dearden.
Alex Hughes has taken Derbyshire close to parity with Glamorgan with an innings of 103 at Swansea before being run out by Michael Hogan. They're 12 behind on 271-5.
The Division Two day-night game is between Northants and Gloucestershire at Northampton. The visitors are 245-8 following on - a slender lead of 25.