Anthony Gibson
BBC Radio Somerset

"He's dictating terms at the moment."

Jonny Bairstow takes Yorkshire past the 200 mark with a four pulled through mid-wicket and into the Western Terrace, dissecting two fielders. Short and too leg side there from Migael Pretorius.

Four more, paddling a short ball square on the leg side.

Nice shot by Liam Patterson-White who drives a full delivery from Tom Price past mid-off for four. They not a lot more of those.

Jonny Bairstow moves to 70 with four runs off Jake Ball, pulling confidently from outside off through mid-wicket.

He gets a single turned to long leg. One ball left in the over.

Outside off stump and Ben Coad leaves it alone.

Mike Taylor
BBC WM commentator

A nagging worry for Warwickshire while they were running through Essex so easily this morning might have been the thought of how they would generate a useful set of batting points on the same surface, against a skilled home attack. Sam Cook and Shane Snater made that fear real by sending back the top three within eight overs.

Those among Essex’s rivals near the bottom of Division One should not look at the score here and wonder if the surface might be penalty-worthy, however. There has been some seam movement, and signs of turn in Manav Suthar’s short spells, but swing – and control of that swing – has made a large contribution to the batting difficulties. Constantly changing overhead conditions may have played a part in that, but the umpires kept the game going even when the lights were needed for a while this afternoon.

In the early period after lunch, George Bell extended his fine effort to an eventually unbeaten 61, playing with enough skill and judgement to be worth far more in other conditions. Without him, Essex might have fallen for fewer than 50, but he took his chances to score and cajoled the tail enough to add 101 for the last three wickets.

Ethan Bamber finally closed the show by yorking Sam Cook, completing a six-pack of wickets for the first time. Today he also passed 100 in the Championship for Warwickshire in only his second season with the county, and for now moved above Kyle Abbott as the most successful bowler in Division One this season, a landmark achievement for a bowler who combines being both Warwickshire’s workhorse and their attack-leader.

Nice way to start.

England's Dan Lawrence receives a half-volley from Zain ul-Hassan and drives it to the cover boundary.

He then pushes a single as the total reaches 50.

Poor finish to the afternoon session for Middlesex as Harry Duke and Zafar Gohar both depart with the score on 222 - both of them run out.

Duke plays the ball for point, sets off for a single but is sent back by Gohar when already half-way down and is beaten by Daz Ahmed's throw to the keeper.

It's exactly the same scenario in the next over as Gohar chops Sai Kishore to point and doesn't even bother to dive as Matt Taylor's throw comes in.

Seb Morgan and Toby Roland-Jones will both be on nought after tea.

Northants' bowlers came out all guns blazing after lunch, taking the wickets of Luis Reece and Brooke Guest in quick succession to reduce Derbyshire to 107-6.

But since then it has been all Derbyshire, with Wayne Madsen hitting an unbeaten century and Ben Aitchison moving to 47 not out as the pair have added 121 runs together.

There were in fact two concerns there. One was a possible leak in the square leg part of the field - and the other was a bit of unevenness on bowler's crease at one end of the pitch.

James Fuller finally completes the fourth over of the innings.

Migael Pretorius bowls outside Kuldeep Yadav's off stump, but the latter is not going to play that one.

Over bowled. Jonny Bairstow is squared up by Jake Ball, who gets one to keep low but defends well enough.

the Yorkshire captain gets a single off the next ball - and a sweetly-timed push through point by Kuldeep brings four runs.

Kevan James
BBC Radio Solent commentator

"I think there's a leak under there."

Down the leg side from James Fuller - and a great diving stop from keeper-captain Ben Brown down the leg side.

The umpires are inspecting the ball for as yet reasons unknown.

They're now looking at a patch on the ground. The plot thickens as a member of the ground staff come on to the field.

Quite an afternoon for Durham, who have added 175 runs for the loss of two wickets at the Riverside.

India's Mayank Agarwal is 109 not out, having shared sizeable partnership with both Ben Stokes and Colin Ackermann.

Stokes reached 50 off just 39 balls but was then lbw playing across the line and looked rather cross with himself after being given out.

The Division two champions are eight runs short of a second batting bonus point, and Agarwal's latest partner, Ollie Robinson, is on 21.

Sam Hain and Vansh Jani successfully negotiate a sticky session to see Warwickshire through until tea.

Rob Yates, Zen Malik and Dan Mousley all fell cheaply early on and the Bears were rocking on 20-3 before Hain and Jani steadied the ship.

They trail by 76.

Earlier, Ethan Bamber took 6-26 and George Bell struck a fine 61 as Essex recovered from 33-7 to post 134.