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Warwickshire 53-2 in 2nd inns after being skittled for 60 by Middx, who made 199
Hampshire shot out for 120 by second-placed Essex, who then struggle on 145-6
Somerset bowled out for 170 by Division One leaders Surrey, who then lose four wkts
Emilio Gay hits 144 for Northants in Manchester, aided by Lancs old boy Luke Procter (75)
Ben Slater hits a ton as Nottinghamshire reach 275-5 against Kent in rain-hit day
Yorkshire make 142-2 against Div Two leaders Durham on rain-hit day at Scarborough
Colin Ingram ton as promotion hopefuls Glamorgan post 408-6 at Derby
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Hampshire 120 v Essex 16-2
It looked inevitable this consistent Hampshire bowling would generate further wickets - and Kyle Abbott is the man who strikes, having Alastair Cook caught behind.
Paul Walter is the new man in for Essex.
Notts 190-4 v Kent
It's been dark overhead for a while, but it doesn't seem to have worsened recently - or developed into rain - so slightly surprising that the umpires have taken the players off the field.
Notts have advanced to 190-4, with Tom Moores on 17 and Steven Mullaney seven.
There will be an early tea, we think.
Lancashire v Northamptonshire 174-3
Luke Wells bowls his first over of part-time leg-breaks as Lancashire try to break this partnership.
Of the 60 overs in the innings, 27 have been bowled by spinners between Wells, Jack Morley and Tom Hartley.
Somerset 170 all out v Surrey
Dan Worrall is fast and straight and knocks over Ben Green's stumps.
Champions Surrey have delivered a terrific bowling display after Somerset won the toss.
Batting is usually their stronger suit although they will have to be careful of Matt Henry and Craig Overton with the new ball.
Somerset will need those two to fire to have any chance of getting back into the game.
Warwickshire 60, Middlesex 59-5
A first wicket for Henry Brookes.
After getting within a run of the paltry Warwickshire total, Middlesex lose their fifth wicket.
Henry Brookes gets a bit of extra bounce, Jack Davies fends one off in fcront of his face and edges to Rob Yates, who takes a sharp slip catch.
The new man in is Ryan Higgins.
Somerset 170-9 v Surrey
As we said, Matt Henry is not known for sticking around!
Gus Atkinson bangs in a short ball, which Henry follows and he gets a nick down leg to the safe hands of Ben Foakes.
A fourth catch of the innings for Foakes.
And before anyone starts - the Foakes v Jonny Bairstow debate is over for this summer...
Hampshire 120 v Essex 8-1
Alastair Cook's long-honed defensive technique is being put to the test now as Hampshire's opening bowlers squeeze the life out of the Essex reply.
Mohammad Abbas and Kyle Abbott have just produced four successive maidens between them, with Cook and Tom Westley finding it impossible to get the ball off the square at the moment.
Somerset 170-8 v Surrey
Matt Henry is not known for hanging around and he whacks successive fours off Tom Lawes.
His 16 runs have come in four hits!
Warwickshire 60, Middlesex 53-4
The 50 up for the visitors at Edgbaston.
And they have got there for the loss of just four wickets.
The Bears were nine down when they reached the same landmark earlier.
Warwickshire 60, Middlesex 49-4 (19 overs)
That was quick.
Back on again in Birmingham - and the Bears make a second bowling change.
Following the earlier introduction of Ed Barnard, Henry Brookes now comes on for OHD, in what his only a second Championship appearance of the season for him.
Lancashire v Northamptonshire 159-3
Luke Procter nudges one behind square to bring up the 100-run stand between him and Emilio Gay off 195 balls. Procter has 35 and Gay, 81.
They dug in before lunch and have batted nicely in the afternoon.
Given their batting problems all summer, this stand is so important for Northants.
Somerset 153-8 v Surrey
Ben Green gets off the mark, cracking one through the offside to bring up the 150.
He will need a few more of those for Somerset to reach anything like a decent total.
Hampshire 120 v Essex 8-1
Here's what the Hampshire crowd came to see Mohammad Abbas doing - the seamer sends down one that straightens and hits the off stump of Nick Browne as the home side look to fight back.
Essex skipper Tom Westley replaces Browne in the middle.
Notts 169-4 v Kent
Ben Slater may have a century to his name, but he didn't look a happy camper after being given out caught behind.
Jas Singh gets one to move away from the left-hander and the apparent thin edge is clasped by Harry Finch.
The light has worsened, though, and the floodlights come on to herald Tom Moores' arrival at the wicket.
Hampshire 120 v Essex 8-0
A steady start for Essex as they reply to Hampshire's total of 120, although there's been a few examples of play and miss from both Nick Browne and Alastair Cook so far.
Browne has six and Cook is on two after the first four overs of the innings.
Notts 166-3 v Kent
Image source, Rex FeaturesBen Slater punches the air with delight as he drives Jas Singh for three to long on and brings up his 11th first-class hundred - his first of the season.
Slater has played very nicely after a slow start and gets to the landmark from 150 balls.
Warwickshire 60, Middlesex 48-4
And, sure enough, off they come!
And the hover cover is on.
After 30 minutes without a wicket (comfortably the longest stretch of the match), the action is finally brought to a halt by the elements.
Somerset 145-8 v Surrey
But Jamie is the ultimate winner in this contest!
The Surrey bowler bangs one in that rises enough to catch the glove of the Somerset batter and Craig Overton is caught behind.
Four, dot, wicket. That counts as a victory for Jamie.
Somerset 145-7 v Surrey
Craig Overton is the new batter and twin brother Jamie has the ball.
And Craig gets a tickle down to fine leg for four off the first one.
Warwickshire 60, Middlesex 48-4
There's movement in the crowd . . .
And rain in the air in Birmingham.
Brollies are going up. And the hover cover is hovering.
Umpires Hassan Adnan and Rob Bailey consult.