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
Worcestershire 113-4 v Durham
Joe Clarke is out, caught at first slip by Paul Collingwood to give Graham Onions his second wicket.
Ravichandran Ashwin comes in at six for Worcestershire.
Somerset 236 v Middlesex 37-5
Paul Stirling doesn't like to hang around.
He biffs Dom Sibley for a maximum before caressing him through the covers a couple of balls later.
Middlesex need 86 to avoid the follow-on.
Warwickshire 12-4 v Hampshire
Another one bites the dust at Edgbaston.
Matthew Lamb is bowled by Fidel Edwards for just six and Warwickshire are sinking out of Division One without much fight.
Leicestershire 15-2 v Northants
This is exactly what Northants need to do.
Ben Sanderson grabs his second lbw of the morning, trapping Ned Eckersley in front.
Northants need to win inside three days after yesterday's washout to stand any chance of promotion.
Worcestershire 113-3 v Durham
Joe Clarke has moved serenely to 65 at New Road.
George Rhodes is providing solid support at the other end.
Does Clarke have an outside chance of making England's Ashes squad? What other outsiders do you think have a chance of getting on the plane to Australia?
Get in touch using #bbccricket on Twitter.
Warwickshire 9-3 v Hampshire
Warwickshire's main nemesis Kyle Abbott slips during his delivery stride and has gone off the field to receive treatment.
Gareth Berg completes the over but the visitors will be hoping their seamer will not be off the field for too long as they seek a three-day victory to avoid relegation.
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Ben Drummond: Feel very sorry for Durham, won't be many Christmas cards heading from the North East to London in a few months.
Keaton Jennings has moved from Durham to Lancashire Ben, but I get your point. Surrey snaffled Scott Borthwick and Mark Stoneman last season. It's all a bit messy.
Somerset 236 v Middlesex 22-5
Madness. Absolute madness.
Paul Stirling is the new man in.
Middlesex need something special from Dawid Malan and the Irishman.
Somerset 236 v Middlesex 22-5
Image source, Rex FeaturesOh. My. Word.
That's superb fielding by Dom Bess!
The two batsmen go for a quick single, but Bess pounces and runs out John Simpson with a direct hit.
He only had one stump to aim at. Middlesex are reeling.
Somerset 236 v Middlesex 18-4
Four down! Dream start for Somerset.
Middlesex captain Adam Voges smacks Dom Bess towards mid-wicket, but Tom Abell snaffles it superbly.
Coupled with Hampshire's excellent opening few overs at Edgbaston, Middlesex are in real trouble.
Image source, Rex FeaturesWarwickshire 5-3 v Hampshire
After a washout on day one, Hampshire are certainly making up for lost time.
Kyle Abbott has his second wicket of the morning as he bowl Ian Bell for a first-ball duck.
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Rob Bernard: The ECB do need to get a grip on loaded decks. Cricket should be an equal battle between bat & ball
Josh Caswell: Interesting morning here at CACG, very cloudy pitch already offering turn. Wouldn't fancy batting to much today! #SomVMid
Leicestershire 5-1 v Northants
Perfect start in Northants' must-win match.
Ben Sanderson pins Michael Carberry lbw at the start of the third over.
Yesterday's washout means Northants will have to get a move on.
But there's some bad news I'm afraid - big Rory Kleinveldt has limped off the field after bowling just 11 balls.
Sussex 232-6 v Nottinghamshire
Harry Gurney makes an early breakthrough for promotion-chasing Nottinghamshire as Delray Rawlins edges behind.
Great start for the visitors at Hove.
Somerset 236 v Middlesex 18-3
Play is under way in the crucial relegation clash.
Jack Leach is bowling the first over, Dawid Malan and Adam Voges are looking to dig Middlesex out of a hole.
Worcestershire 95-3 v Durham
He's some prospect is Worcestershire's Joe Clarke.
The 21-year-old clips Graham Onions for a couple to bring up his half-century off just 52 balls.
Worcestershire need a maximum of six points to seal promotion.
Warwickshire 1-2 v Hampshire
Two wickets in the second over for Hampshire as Kyle Abbott lures Jonathan Trott into a drive but the former England batmen only succeeds in edging to James Vince in the slips.
The visitors. who are playing for their Division One status, have started very well!
Warwickshire 1-1 v Hampshire
Oh dear...
A disastrous start for Warwickshire as Liam Banks pushes for a single but is left stranded in the middle of the pitch by Dominic Sibley and is well run out by Tom Alsop.
Image source, Getty ImagesWhile our matches are beginning to warm up, some news from Chester-le-Street this morning...
England and Durham batsman Keaton Jennings will leave Durham at the end of the season to join Lancashire on a four-year deal.
The 25-year-old joined the north-east county in 2012 and had signed a new four-year deal in August 2016 before the side were relegated to Division Two after financial issues.
"It's a fantastic opportunity for me to play Division One cricket at a Test match ground for a club, like Lancashire, with such a great history and tradition," Jennings said.
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