Surrey v Middlesex abandoned after arrow fired into The Oval at 16:35 BST
Division One leaders Essex beat Somerset
Lancashire beat Warwickshire by eight wickets despite Tim Ambrose's 104
Division Two leaders Nottinghamshire beat Northants by 163 runs
Ravichandran Ashwin takes 5-68 as Worcestershire defeat Gloucestershire
Durham beat Derbyshire by nine wickets at the Riverside
Middlesex 247 & 33-2 (13 overs) v Surrey 280
Quite a flurry of wickets at the moment and there have been two in the same Sam Curran over at the Oval, where the ball is 'doing a bit' through the air. Sam Robson is caught behind for 21 and three balls later Adam Voges departs for a duck, edging to slip. The scores are level, by the way.
Image source, Getty ImagesDurham 480-9 dec v Derbyshire 164 & 325-9 (102.2 overs)
Graham Onions and Chris Rushworth have been round long enough for the word 'venerable' to be used to describe them. Another one would be 'accomplished', certainly in terms of their new-ball skills, and Rushworth claims the second wicket of the morning as Harry Podmore departs.
Two balls later and Onions has Harvey Hosein lbw for 16. So Derbyshire's last-wicket pair are together, they're only a few runs ahead - and this match isn't going to last much longer.
Worcestershire 363 & 295-8d v Gloucestershire 258 & 75-5 (32.3 overs)
The race is on: who can wrap up their Division Two win the quickest? Notts may be winning, but with Ravichandran Ashwin bowling, Worcestershire might fancy their chances.
George Hankins goes without scoring to give the Indian his sixth wicket of the match.
Notts 213 & 344-9d v Northants 141 & 192-7 (56.1 overs)
Northants are dissolving like a cake left out in the rain. Josh Cobb is the latest to go, with Chris Read taking his third catch of the morning off Jake Ball.
Worcestershire 363 & 295-8d v Gloucestershire 258 & 72-4 (31.4 overs)
As Notts move another step towards a win, so do fellow Division Two promotion-chasers Worcestershire. Ed Barnard traps Tom Smith lbw. One down, six needed.
Notts 213 & 344-9d v Northants 141 & 192-6 (55.3 overs)
Same combination does the trick again for Notts as a wild swipe from Rory Kleinveldt ends in his downfall. Brett Hutton is the bowler, Chris Read the catcher. This game could be over quickly.
Richard Gleeson comes in to bat. Adam Rossington's injury may mean he is next.
Feast your eyes on his awful shot.
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Ireland bowlers Barry McCarthy and Craig Young are ruled out of the one-day international against West Indies at Stormont next month.
Read MoreEssex 159 & 176-4 (71 overs) v Somerset 164
No wickets as of yet at Chelmsford, but Craig Overton has had a few lbw appeals turned down, while Tim Groenewald has also shelled a catch to let off Ryan ten Doeschate.
Division One leaders Essex lead by 171 runs.
Image source, Rex FeaturesDurham 480-9 dec v Derbyshire 164 & 319-7 (99 overs)
Derbyshire clear the deficit at the Riverside and move three runs ahead, having been forced to follow-on by home skipper Paul Collingwood yesterday morning. Harvey Hosein has 14 not out and is now being kept company by loan signing Harry Podmore.
Middlesex 247 & 23-0 (8.4 overs) v Surrey 280
Unexpected turn of events first thing at the Oval with Nick Compton unable to resume his innings for Middlesex. Remember, there was no play in this game yesterday, so why has the England batsman had to retire hurt? More info on that when we have it. Anyway, Stevie Eskinazi is out there with Sam Robson, who gets things moving with back-to-back fours off Sam Curran.
Notts 213 & 344-9d v Northants 141 & 174-5 (52.1 overs)
Brett Hutton has been fantastic in this match for Notts and he's taken the crucial wicket of Northants skipper Alex Wakely early doors, having him caught behind by Chris Read.
Rory Kleinveldt has come out to bat ahead of the injured Adam Rossington. Notts need five wickets to win.
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Worcestershire 363 & 295-8d v Gloucestershire 258 & 59-3 (27 overs)
If you have Ravichandran Ashwin in your side on a fourth-day pitch, you're likely to make use of him. Worcestershire have done just that, giving the Indian Test spinner the ball straight away.
Gloucestershire have Gareth Roderick and Tom Smith at the crease and need 342 runs with seven wickets remaining.
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Durham 480-9 dec v Derbyshire 164 & 310-7 (97 overs)
Perfect start for Durham as Graham Onions finds the edge with his fourth delivery of the the morning at the Riverside. Wicketkeeper Michael Richardson makes no mistake and Tony Palladino is on his way.
Hurray! Six of our seven games start on time - the exception being at Old Trafford.
As usual we'll be focusing on Division One primarily, but with added attention to Notts v Northants at the top of Division Two. We will endeavour to keep pace with the others too, especially as they near their conclusions.
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Episode four of the exclusive new BBC cricket text comm series 'Martin's Shirts'.
Here is the man himself, with his preview of Durham v Derbyshire.
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Essex 159 & 158-4 v Somerset 164 - match resumes 11:00 BST
Image source, RexA positive result is still on the cards at Chelmsford despite only 55 minutes of play being possible on the third day in the Division One between Essex and Somerset.
The home side are 153 ahead and will look to press on this morning in the hope of their strong bowling attack bowling out Somerset later in the day to move a step closer to a first title since 1992.
"It's probably beneficial that there were so many wickets on that first day and second morning because it meant the game went forward quickly," said not out batsman Adam Wheater (58*).
"It's pretty evenly balanced at the moment. But I'm sure we're going to bat for a little while and see where we go from there."
Did any of you know that BBC Radio London's Mark Church is a part-time impressionist?
Here he is doing his Harry Redknapp.
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County Championship (play starts 11:00 BST)
As usual, our BBC 5 live Sports Extra and local radio teams will be providing ball-by-ball coverage of today's matches. Choose the match you're interested in from the link at the top of the page to tune in.
Will we hear a finish to match the excitement at Colwyn Bay yesterday when Adrian Harms and Nick Webb described Sussex's one-wicket win over Glamorgan (listen below)*? Let's hope so.
*No, Andy Murray wasn't at Colwyn Bay (at least, we don't think he was) - Adrian Harms just likes that photo.
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Warwickshire 200 & 275-6 v Lancashire 504-8 dec
Image source, Getty ImagesWarwickshire wicketkeeper/batsman Tim Ambrose refuses to accept that victory is out of the question on the final day against Lancashire at Old Trafford.
The Bears still trail by 29, with only four wickets remaining, and are bottom of Division One, but Ambrose believes they must "keep being positive".
He was 76 not out overnight and told BBC Coventry & Warwickshire: "We dug our heels in a bit in that second innings. We had something to prove after not getting quite as many runs as we'd have liked in the first innings.
"It's turning a lot and there's still a bit of a nibble with the new ball and, if we can get some sort of total together and set a target, there's no reason why we can't have a crack at it."
Leicestershire 350 v Kent 313-9 - match resumes at 11:00 BST
Adam Whitty
BBC Radio Kent commentator
After yesterday's play was washed out by the weather, day four is a fascinating prospect.
Both Kent and Leicestershire's second innings will need to be played today, so expect a declaration from Kent this morning, despite trailing the visitors first innings total by 37 runs.
The Spitfire Ground seems a world away from yesterday's miserable weather
Kent, who are currently in fifth place, need to win to keep hopes of promotion alive, while Leicestershire are still seeking a first win of the season..
So should a chat between Sam Northeast and Mark Cosgrove take place, that may mean a flurry of Leicestershire runs this morning, a declaration, and then a total is set of say, 320 in 60 overs?
Another issue stands in their way though: the threat of rain, expected in the early afternoon.