Somerset will stay up if they beat Middlesex
Middlesex down if they lose & Hampshire win or draw
Hampshire out for 116 at Edgbaston
Hants relegated if they lose & Somerset win
Worcs promoted if they take 9 Durham wickets inside 110 overs
Northants & Notts also chasing promotion
Sussex 565 v Nottinghamshire 67-5
Another one bites the dust at Hove.
Nottinghamshire's batsmen are batting on a different pitch to the one Sussex batsmen were earlier!
Samit Patel falls lbw to Staurt Whittingham to leave the visitors in serious trouble.
Should Notts fail to make at least 400 runs in their first innings, then only victory over Sussex would guarantee promotion to Division One.
Somerset 236 & 135-3 v Middlesex 142
Image source, Rex FeaturesThis game has drifted away from Middlesex after tea.
But James Hildreth and Tom Abell have shown superb composure for Somerset.
Middlesex skipper Adam Voges comes into the attack for the first time - they need to try something new.
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Paul Wragg: Call up Vince and Ballance they said.... behave! Get Browne and Lawrence on that plane first
Warwickshire 188 v Hampshire 59-4
Kevan James
Sport Presenter, BBC Radio Solent
I just love watching Oliver Hannon-Dalby bowl, I really do.
He just shows the whole chest to the batsman. His shoulders are pointing from extra cover to mid-wicket as he bowls. You cannot get more square on than that, it’s amazing
Lancashire have been bowled out for 268 by Surrey for a first-innings lead of 67.
Essex are ticking along nicely at Chelmsford against Yorkshire in their second innings - they're 90-2 with Nick Browne and Dan Lawrence both on 42.
The lead stands at 206.
Image source, Rex FeaturesIn Division Two as you've just heard from Nick Webb, Kent have slumped to 35-4 in their second innings against Glamorgan but still lead by 108.
Derbyshire are 410-6 at Gloucestershire - Alex Hughes making a career-best 142.
Kent 302 & 35-4 v Glamorgan 229
Nick Webb
BBC Wales Sport
Kent's Sam Billings has left his team's game against Glamorgan for England duties after the exclusion of Ben Stokes and Alex Hales from selection for the next One-Day International against the West Indies.
That meant Adam Rouse being drafted into the Kent side and shoved straight into action as the home side lost four quick wickets.
Michael Hogan claimed three of them to reach 500 first-class wickets, so Glamorgan were left bowling at a man who had not been in the team at the start of play.
Sussex 565 v Notts 55-4
Nottinghamshire's promotion hopes are drifting away.
Riki Wessels goes cheaply, nicking Jofra Archer behind.
They need a maximum of 12 points to ensure they go up - but that looks a mile away at the moment.
Worcestershire 335 v Durham 30-3
Durham are crumbling at New Road.
Cameron Steel is the third batsman to go, edging Joe Leach behind.
Worcestershire require six more wickets to seal promotion. Can they do it tonight? 25 overs are left, but light could be an issue.
Warwickshire 188 v Hampshire 51-4
Hampshire lose their fourth wicket as Oliver Hannon-Dalby traps Sean Ervine plumb in front.
The visitors are in real trouble at Edgbaston now.
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Max Coplin: I'm a Northants fan and would love us to get promoted however I'm not sure if our squad would be strong enough for Division One.
Somerset 236 & 121-3 v Middlesex 142
Interesting news from BBC London's Kevin Hand.
Meanwhile James Hildreth is motoring now - he hits Tim Murtagh for back to back fours to move to 63.
Somerset's lead stands at 215.
Sussex 565 v Nottinghamshire 44-3
Stuart Whittingham has his second wicket in as many overs as he bowls Steven Mullaney.
Northants may be tempted to up the tempo in their batting against Leicestershire as Notts' struggles at Hove continue.
It's been a long old season. It started on 7 April and now autumn appears to have arrived at New Road...
Image source, Rex FeaturesWorcestershire 335 v Durham 24-2
Put the champagne on ice Worcestershire fans - your side needs seven more wickets for promotion.
Jack Burnham's timbers are rattled by teenage paceman Josh Tongue.
That's 47 Championship wickets for Tongue this season. Impressive.
Leicestershire 128 v Northants 105-2
Oh, but that's a blow.
Northants captain Alex Wakely goes cheaply to Dieter Klein.
Big Richard Levi strolls to the middle.
Leicestershire 128 v Northants 105-1
That's fifty for Luke Procter.
He's faced 99 balls and hit eight fours.
Northants are dominant in this must-win game.
Sussex 565 v Nottinghamshire 33-2
Stuart Whittingham had been causing Cheteshwar Pujara all sorts of issues and finally wins the battle between the two as he traps the Indian batsman lbw.
Not the start the visitors would have wanted to their innings after Sussex racked up the runs in Hove today.
Lancashire 262-8 v Surrey 201-8 dec
Yep, I'm a curse.
Steven Croft is out, edging Sam Curran behind.
Soz.
Century for Steven Croft
Image source, Rex FeaturesThe Lancashire captain is rounding off his season rather nicely, having reached a fine century a few overs ago.
The Red Rose are 257-7 and lead Surrey by 57.
In the other Division One match, Essex's lead over Yorkshire is creeping up towards 200 - the champions are 60-2 in their second innings.
Somerset 236 & 107-3 v Middlesex 142
James Hildreth has scored 40 first-class hundreds, but this might just be one of his most important knocks for Somerset.
The 33-year-old moves to a half-century and takes Somerset's lead past 200 in the process.
Great batting in really tricky conditions.
Image source, Getty Images