Yorkshire beat Somerset by an innings and 33 runs
Division One: Notts v Lancs, Warwickshire v Hants, Yorks v Somerset
Division Two: Durham v Glamorgan, Essex v Glos, Northants v Surrey
Division Three: Derbys v Leics, Kent v Worcs, Sussex v Middlesex (day one)
After Middlesex's record-breaking day, elsewhere in Division Three, Worcestershire are heading towards defeat at Kent. They're 88-5 in their second innings, still needing 172 to avoid an innings loss.
Derbyshire are also struggling against Leicestershire on 41-3 in response to the Foxes' 528 all out.
Stumps has been called at Chelmsford with Gloucestershire 132-5, still trailing Essex's first-innings total by 68.
Elsewhere, Surrey lead Northamptonshire by 176. They're 95-4 in their second innings in Northampton. Not long to go there.
And Glamorgan are still batting, 71-2 - a mammoth 335 runs off making their opponents Durham bat again.
Sussex v Middlesex 400-2
An incredible first day comes to an end on the south coast.
A day that has seen Middlesex openers Sam Robson and Mark Stoneman share the county's highest first-wicket partnership of all time.
They'd put on 376 when Stoneman fell for 174, beating Mike Gatting and Justin Langer's 372 from 1998.
Robson goes to stumps on 192.
Mullaney c Lavelle b Bailey 1 (Notts 272 & 107-5 v Lancashire 168)
Lancashire's Tom Bailey has his second as Steven Mullaney edges behind to the keeper.
A good final hour so far for Lancs.
Yorkshire 308 v Somerset 134 & 100-7
Jack Leach won't give this up without a fight.
Batting at number nine, the England spinner picks up a couple of boundaries off Matthew Fisher to move to 18 and bring up Somerset's 100.
74 needed to make Yorkshire bat again.
Warwickshire 116 v Hampshire 89 & 260-8
Stumps on day two in Birmingham.
A superb unbeaten stand by former Bear Keith Barker (49 not out) and Brad Wheal (29 not out) have dragged Hampshire back into this one.
The visitors lead Warwickshire by 233.
Clarke c Jones b Balderson 22 (Notts 272 & 102-4 v Lancashire 168)
A fourth wicket for George Balderson as he removes Joe Clarke for 22.
Nottinghamshire lead by 210 runs with around 10 overs let on day two.
Warwickshire 116 v Hampshire 89 & 257-8
Five minutes of play left at Edgbaston.
Warwickshire have been frustrated by Hampshire's tail in the last hour.
Keith Barker (48) and Brad Wheal (28) both currently at the crease have added 49 runs together.
Davies c Kohler-Cadmore b Hill 25 (Yorkshire 308 v Somerset 134 & 69-7)
Maybe Yorkshire won't need a third day...
Steven Davies gets a leading edge off George Hill and Tom Kohler-Cadmore grabs it at first slip.
Three wickets to go with 15 overs left on day two.
Yorkshire 308 v Somerset 134 & 69-6
No more wickets for Yorkshire, but with the weather set fair, it's no bother if this game goes into day three.
Somerset still trail by 105. They need a miracle.
16 overs to go this evening.
Image source, Rex FeaturesStoneman c Carter b Crocombe 174 (Sussex v Middlesex 376-1)
Soon after breaking Middlesex's first-wicket partnership record with Sam Robson, Mark Stoneman goes.
The left-hander edges Henry Crocombe behind for 174.
What an innings, one that will go down in the history books.
Sussex v Middlesex 373-0
The records keep on coming at Hove!
Mark Stoneman and Sam Robson have now shared Middlesex's highest first-wicket partnership of all time.
It beats the 372 put on by Mike Gatting and Justin Langer against Essex at Southgate in 1998.
Robson has 180, Stoneman 172. Incredible batting.
Durham 503-8 dec v Glamorgan 97 & 27-1
Martin Emmerson
BBC Radio Newcastle
Worcestershire's Jake Libby was out for 23 in their second innings against Kent today. So the race to 1,000 Championship runs remains alive.
Libby needs another 24 to be the first player to get there, while Durham's David Bedingham needs eight after he was dismissed for 47 earlier today.
Libby has played in one more game and had two more knocks than Bedingham and that's the way it may stay after this week because Bedingham may not have to bat again in the match with Glamorgan.
Durham declared their first innings on 503-8, with five players making half centuries. But crucially they had a massive lead of 406. And since Glamorgan were all out for just 97 in their first innings - and dismissed cheaply in their two innings against Essex the last time out - it's unlikely Bedingham will be needed again.
They have already lost a wicket with David Lloyd caught in the gully for six by Liam Trevaskis off Matty Potts. They are now 27-1.
Derbyshire 18-1 v Leicestershire 528
Leicestershire seamer Chris Wright has just removed Derbyshire opener Tom Wood for his 500th first-class wicket.
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Northeast c Lavelle b Bailey 13 (Notts 272 & 85-3 v Lancashire 168)
Sam Northeast is the latest to go and this is all about the catch from keeper George Lavelle.
Outstanding grab.
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Banton c Duke b Thompson 10 (Yorkshire 308 v Somerset 134 & 45-6)
Image source, Rex FeaturesFour to go!
Tom Banton nicks Jordan Thompson behind to leave Somerset six down.
This should be done inside two days now. You don't see that very often.
Plenty going on in Division Two. Durham have declared on 503-8, giving them a huge 406-run lead over Glamorgan.
Seven Durham players made 40 or more in that innings, with Michael Jones (81) and Ben Raine (74) particularly impressive.
Elsewhere, James Bracey (42 not out) is leading Gloucestershire's recovery. They're on 110-2, 90 runs short of making Essex bat again.
And Surrey are continuing to build in their second innings. The hosts are 45-1, giving them a 126-run lead over Northamptonshire.
Yorkshire 308 v Somerset 134 & 40-5
Steven Davies and Tom Banton have just calmed things a little for Somerset at Scarborough.
But they're still staring down the barrel. 134 more needed to avoid an innings defeat.
Image source, Rex FeaturesAway from Hove, Leicestershire have finally been bowled out by Derbyshire for 528.
And Worcestershire are 38-1 in their second innings at Canterbury - they still trail Kent by 222.
Sussex v Middlesex 342-0
A 126-year-old record has been broken at Hove!
This is now Middlesex's best partnership for any wicket against Sussex, beating the 338 put on by Robert Lucas and Tim O'Brien for the fifth wicket at the same ground in 1895.
Mark Stoneman has 159 and Sam Robson is 165 not out.
Next stop - Mike Gatting and Justin Langer's 372 - the highest first-wicket partnership for Middlesex against any county.