Notts lead Yorkshire by 446 with Joe Clarke 97no after first-innings century
Alastair Cook is out for eight after Essex follow-on against Hampshire
Somerset 133 ahead with only three wickets left against Kent
Leics set a target of 230 to beat Sussex after Colin Ackermann's 5-69
Northants make Middlesex follow-on after bowling them out for 271
Durham 10-0 at close, chasing 361 to beat Derbyshire
Notts 408 v Yorkshire 291
Yorkshire all out for 291.
Notts bring back England's Stuart Broad and he digs a short one in at Duanne Olivier, who fends behind to wicketkeeper Tom Moores.
Ben Coad finishes not out on 26.
It means a lead of 117 runs for the hosts, a hefty advantage to take into the second innings.
Notts 408 v Yorkshire 290-9
While Yorkshire tailenders Ben Coad and Duanne Olivier frustrate the Notts' attack, here are the flurry of wickets from Samit Patel that have put the home side well on top.
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A quick update from one of the six county v university matches with Warwickshire's Adam Hose retiring on 200 not out against Leeds/Bradford MCCU after hitting nine sixes and 19 fours. The Bears are 454-6 in their second innings, a lead of 622.
Hampshire 525-8 dec v Essex 82-2
Kevan James
BBC Radio Solent commentator
If Essex are to save this game, then Alastair Cook, you feel, is the key.
On a good pitch offering little for the bowlers, conditions seem ripe for a typically long Cook innings.
I can think of only one play and miss and one half shout for an lbw against the former England captain so far.
Could be a long two days for Hampshire.
Notts 408 v Yorkshire 283-9
Yorkshire might have two tailenders in but Ben Coad has coped with Samit Patel better than anyone.
He crisply hits the Notts spinner over the long-off boundary for consecutive sixes to all of sudden make the scoreboard look a little better for the White Rose.
Paul Coughlin gets a bit of revenge for his mate in the next over though as he plants a short ball right into the ribs of the Yorkshire fast bowler.
Coad's response? A straight drive for four.
Somerset 171 v Kent 144-5
Image source, Rex FeaturesWe spoke too soon (see 12:19), but that's a terrific delivery from Craig Overton which cuts back between bat and pad and knocks Heino Kuhn's middle stump out of the ground. A setback for Kent, but they still look a good bet for some sort of first-innings lead at Taunton.
Somerset 171 v Kent 138-4
After the loss of two early wickets, Kent have now settled down at Taunton and Daniel Bell-Drummond and Heino Kuhn are building a nice little partnership.
It's now worth 41 after Kuhn lofted Craig Overton back over his head for four to join DBD on 18 not out. Kuhn wasn't fully in control of that stroke, but he won't complain about the result.
Northamptonshire 445 v Middlesex 190-8
Alex Winter
BBC Radio Northampton sport
Another chilly day at Wantage Road and a thick layer of stratus cloud making things very gloomy - thankfully the floodlights can now be used here for Championship matches.
Middlesex have been outplayed for two days and face a battle to save this game. There's still plenty there for the bowlers but a little more care and attention has saw the eighth-wicket pair get through the opening 50 minutes of play unscathed.
Toby Roland-Jones has now gone, though, and saving the follow-on - 296 the mark - seems very unlikely, but the more time they can eat up this morning, the easier the task in the second innings.
Notts 408 v Yorkshire 265-9
Image source, Getty ImagesSamit Patel takes the edge and Steven Mullaney catches at first slip for the third time in 20 minutes.
Yorkshire captain Steven Patterson almost spoons it straight to his opposite number, and it's a simple take.
Notts pressing home a big lead and they also now have maximum bowling points.
Yorkshire collapsing - they were 253-6 when England captain Joe Root gave his wicket away with a rash shot.
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The phrase 'Notts are tilting at windmills' might come in handy here, except for the fact that the Yorkshire batsmen are real, not imaginary.
Hampshire 525-8 dec v Essex 63-2
We have now had six people keeping wicket in this match, Adam Wheater, Dan Lawrence and Will Buttleman for Essex, and now Tom Alsop, James Vince and Lewis Mcmanus for Hampshire.
Vince's spell behind the stumps was brief, after Abell suffered a hand injury, with McManus quickly on the scene as a specialist replacement.
Derbyshire 197 & 143-3 v Durham 171
Martin Emmerson
BBC Newcastle commentator
I have to say I am surprised we got going on time in Derby because it is really gloomy, even with the lights on.
Alex Hughes (23) and Tom Lace (56) continue to make progress and have not been unduly troubled in the first hour.
Their partnership is now worth 60, the highest of of the game.
Image source, BBC SportCricket in the gloom of Derby
Notts 408 v Yorkshire 262-8
Yorkshire were in real trouble, now they're in really real trouble.
Matthew Waite is gone for 22. He plays a forward defensive shot to Samit Patel, but the Notts' spinner gets a bit of grip and turn from around the wicket - enough to take the outside edge.
Then a bit of luck comes in as the ball ricochets off wicketkeeper Tom Moores and balloons up for an easy catch at slip, that captain Steven Mullaney gleefully accepts.
Double strike for Patel.
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Former Test umpire Dickie Bird is at Trent Bridge to watch Yorkshire against Notts. He won't have enjoyed seeing Joe Root dismissed.
Image source, Getty ImagesHampshire 525-8 dec v Essex 55-2
Alastair Cook is certainly not being given many freebies by the Hampshire attack. The former England captain has collected a couple of boundaries in moving to 35 not out, but is having to be watchful - still, there's no-one better at that. Fidel Edwards has now gone off, with Gareth Berg taking up the attack.
Notts 408 v Yorkshire 249-7
HUGE wicket for Notts! England captain Joe Root is gone for 73 and Yorkshire are in real trouble now.
He went down the pitch to try and heave Samit Patel's left-arm spin over the long-on boundary. All he did was meet the ball with a thick outside edge, giving Notts captain Steven Mullaney a regulation catch at first slip.
Root was looking so comfortable.
Image source, Getty ImagesNotts 408 v Yorkshire 246-6
That didn't last long. Notts' Jake Ball is replaced by the left-arm spin of Samit Patel.
A couple of singles milked off him and Fletcher continues at the other end, where we can only assume Ball will operate from soon.
Unless he's injured, or just needed the loo?
Leicestershire's Tom Taylor has taken a couple more wickets at Hove, removing Luke Wells (48) and David Wiese in successive overs. Ben Brown fell to Colin Ackermann in between and the home side are now 236-6, 157 ahead.
Overnight pair Toby Roland-Jones and James Harris are still together for Middlesex at Northampton, with the visitors 165-7, still 280 in arrears.
Derbyshire are 134-3 against Durham, with Tom Lace now 53 not out in an unbroken 61-run partnership with Alex Hughes. They lead by 160.
Vivid batting gloves being worn by Kent skipper Heino Kuhn at Taunton.
If you just glanced quickly at the photo, you might think his right hand had mutated into a lobster claw.
Image source, Rex FeaturesNotts 408 v Yorkshire 233-6
Not much respite for Yorkshire as the first change of the morning sees Nottinghamshire bring on forgotten England fast bowler Jake Ball to replace England stalwart Stuart Broad.
His line is a bit all over the place, but he does rap the pads a couple of times. The over ends in superb fashion for Yorkshire though as Matthew Waite clips beautifully through midwicket for four.
He's looked superb for his 12.
No change at the other end, after Luke Fletcher did this earlier...
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