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Division One leaders Hampshire and third-placed Lancashire not in action
Second-placed Surrey at Northants and will reclaim first place if they avoid defeat
Warwickshire host Somerset in key game at bottom of Division One table
Second-placed Glamorgan visit fourth-placed Middlesex in Division Two, with both sides in promotion picture
Somerset 143-8 v Warwickshire
Lewis Gregory goes to the 18th first-class half-century of his career.
From 82-7, he has spearheaded an important rescue bid from Somerset - and will be hoping to add a few more after beg joined by Sajid Khan.
Somerset 140-8 v Warwickshire
A fourth wicket for Mohammed Siraj as Warwickshire end the 58-run stand between Lewis Gregory and Josh Davey.
Siraj wins his second LBW decison to remove Davey for 21, leaving Lewis Gregory on 49.
Northants 216-3 v Surrey
Surrey captain Rory Burns has moved his slip catchers out and wouldn't you know it, Rob Keogh edges one through the vacant cordon and picks up four.
Kemar Roach is not happy.
Leicestershire 97-2 v Durham
That's it for the day at Leicester.
Having been off now since just before lunch, there were concerns over the damp outfield - and umpires Tom Lungley and Chris Watts hae decided to call it off following a 4:30 inspection.
The forecast was not great anyway - and more rain was due.
Not a huge surprise.
Disappointing for new boy Sol Budinger, after hitting an unbeaten half-century on his first-class debut, but he will resume in the morning on 63 out of Leicestershire's 97-2, looking for at least 37 more.
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Northants 211-3 v Surrey
The part-time leg-spin of Cameron Steel nearly does the trick.
It's a filthy full toss which Emilio Gay looks to smash through the covers, and it's almost caught by Hashim Amla at mid-off.
The ex-South Africa batter gets two hands to it, but he can't hang on although it would have been a spectacular grab.
Gay survives, gets two more runs and is now on 128.
Northants 201-3 v Surrey
Rob Keogh brings up his half century with a single off the part-time leg spin of Cameron Steel.
It's taken 92 deliveries with seven fours and is just the third in the Championship for Keogh in 2022.
Yorkshire 134 all out v Essex
Just as the umpires were preparing for a 16.30BST inspection, the rain has returned.
Not sure if there will be much chance of play again today.
Northants 194-3 v Surrey
Three more to Emilio Gay and that is the 100 partnership with Rob Keogh.
Coming in at 94-3, Keogh has played an understated hand to Gay but he has accumulated 45.
Northants 188-3 v Surrey
Emilio Gay guides one down past gully to the boundary to add four to the total.
That takes him to 116, and his best ever first-class score.
Leicestershire 97-2 v Durham
Umpires Tom Lungley and Chris Watts are about to inspect again at Leicester.
The forecast is not great, but if there is any chance to get some cricket in, they will.
They have been off now since just before lunch, delayed by a damp outfield.
Northants 184-3 v Surrey
Not much is happening from a bowling perspective at the moment for Surrey.
They have used five bowlers but it looks a decent track for batting as Emilio Gay is demonstrating.
Not a single over of spin, yet.
Regular spinner Will Jacks will not play for them in the Championship again this season as he heads to Pakistan for England's seven T20 matches over there after impressing in The Hundred with the Oval Invincibles.
Division One
Northamptonshire 166-3 (49 overs) v Surrey (Wantage Road)
Somerset 117-7 (41 overs) v Warwickshire (Edgbaston)
Yorkshire 134 all out v Essex (Leeds)
Division Two
Leicestershire 97-2 (22 overs) v Durham (Leicester)
Glamorgan 214, Middlesex (Iatest) 50-1 (Lord's)
Sussex 220, Worcestershire (latest) 29-0 (Hove)
Somerset 117-7 v Warwickshire
One more boundary from Josh Davey in the next over, off fellow spinner Jayant Yadav, and that's the final action of the session in Birmingham as they go to tea.
Six wickets and 101 runs in the session, in 29 overs.
Intriguing and entertaining fayre.
Middlesex 36-1 v Glamorgan 214
Glamorgan get their first wicket at Lord's.
Sam Robson is drawn into an edge by Michael Hogan and Shubman Gill pouches it low down at third slip.
Somerset 113-7 v Warwickshire
Lewis Gregory takes the attack back to Warwickshire with three straight sixes off Danny Briggs to take Somerset to three figures.
He has moved to 42 in a rapid 31-run stand with Josh Davey.
Heroic stuff from the winning Hundred skipper.
Yorkshire 134 all out v Essex
The rain has relented at Headingley, and there will be an inspection at 16.30 BST if there is no rain between now and then.
Not sure how keen the Essex batters will be to get out in these conditions.
Northants 170-3 v Surrey
The start of the final session at Northampton and Rob Keogh gets a four-ball from Dan Worrall to get things under way.
Sussex 220 all out v Worcestershire
Adrian Harms
BBC Sussex
An entertaining day's play at Hove so far.
Having won the toss, Sussex recovered from the depths of 23-5 to eventually being bowled out for 220 on the stroke of tea.
Off-spinner Jack Carson, playing his first match of the season after injury, top scored with 58, while Fynn Hudson Prentice and James Coles also made half centuries
Joe Leach was the pick of the Worcestershire attack, taking four wickets and passing 400 career first-class scalps in the process.
Leicestershire 97-2 v Durham
The good news from Grace Road is that it is not currently raining.
The bad news is that is due to return at about 5 o'clock.
Meanwhile, the umpires are to inspect again at 4 - but the outfield is stil damp.
Thanks to BBC Radio Leicester's Richard Rae for his succinct summing-up of the situation.
Overall prospects: Not good.
Somerset 82-7 v Warwickshire
Henry Brookes strikes again in Birmingham as he earns an LBW decision against Kasey Aldridge.
Somerset are in a mess as Josh Davey comes in to join Lewis Gregory.