And now the 50 partnership is up between Colin Ackermann and Matty Potts.

They're doing a fine job for their side.

They'd planned a 12:15 BST start at Essex, but it's raining again. Very heavily.

New ball - replacement ball for Surrey after consecutive boundariespublished at 12:14 British Summer Time 15 April

12:14 BST 15 April

Surrey 428 v Somerset 285 & 212-6

First runs of the day, Lewis Gregory through the covers off the back foot for four.

Short and wide from Jamie Overton with the 69.4 over old ball.

And almost an action replay, same ball, shot and outcome the following delivery.

Cue the big North Devon quick asking for a new ball, but do not be fooled, not a new ball, just a replacement for this supposedly warped one.

First ball with it of course then cuts Gregory in half.

Shah Faisal
BBC Radio Leeds

The bowling patterns - I have to say I've been surprised on this cold and blustery day, you would have thought seam would have been the order of the day to start off at least.

50 up for Durhampublished at 12:11 British Summer Time 15 April

12:11 BST 15 April

Warwickshire 698-3 dec v Durham 517 & 51-2 (f-o)

Matty Potts brings up Durham's half-century in the 26th over of their second innings, rocking back onto his back foot off the bowling of Rob Yates and guiding the ball nicely to the cover fence.

Potts has three first-class fifties and a best score of 81 - he's up to 27 now.

That shower was only short lived and we have play in south London!

Jamie Overton with the ball from the Vauxhall End, into his former team-mate and captain Lewis Gregory.

Somerset's lead is 61... what can they stretch it to?

Joe Root has just spun his way through an over. Still no breakthrough for Yorkshire this morning.

The hosts are frustrating them and it's down to some solid batting from Ollie Price (47 not out) and James Bracey (15 not out).

Only three of our nine scheduled games have got under way, with six that have failed to get going on day four because of the wet weather.

There will be no play before lunch in the games at Hampshire and Northants.

Another lbw appeal by Rob Yates against Matty Potts is turned away by the umpire.

Durham have made it through the first hour without losing a wicket. They still trail by 143 runs, but it's all about limiting the damage to the "wickets" column today.

Harry Everett
BBC Sport at The Oval

Former Somerset, now Surrey head of physical performance, James Alway has been running down and leaving deliveries through to Ben Foakes stood up to the stumps.

Kasey Aldridge and Lewis Gregory of course will not intend to gift their wicket away that easily, but Cam Steel and Dan Lawrence were the main Surrey protagonists in the first innings and bowled plenty of overs yesterday too.

Surely they will be key, up to and even with the new ball for the home side in this hour session before lunch.

Bad news though... we were due to get under way at 12:00 BST... but the covers are coming back on. Hopefully only a passing shower.

Image source, Getty Images

Chloe Brewer
Central Sparks batter on BBC local radio

Durham just need to bat today, just stay out there and try not to give Warwickshire an edge.

It's been slow going in the 20 minutes play we've had in Bristol with just three runs in six overs.

But with showers about, Gloucestershire will no doubt want to bat for the draw. They're not chasing 498.

Yorkshire have a pace/spin combo at the moment, with Dan Moriarty and Ben Coad bowling in tandem.

Martin Emmerson
BBC Radio Newcastle

Looking through the scorecards, six scores are above 500 in this round of matches, which is not only highly unusual but certainly for the time of the year, and everybody is pointing the finger at the Kookaburra ball.

The Dukes ball returns on Friday and you can guarantee that half the matches will be over in two days or so.

And a big appeal with Rob Yates' second ball! He's adamant that he's trapped Matty Potts lbw but the umpire disagrees.

Plenty of turn for Yates, though - that will interest the Bears a lot.

Durham's job for today is pretty simple - bat all day.

Runs don't particularly matter too much, it's all about using up time.

Warwickshire have turned to spin for the first time today as Rob Yates, who took a career-best 4-137 in the first innings, is chucked the ball by Alex Davies.

Glamorgan have made an early breakthrough in Cardiff and it's the big wicket of Derbyshire skipper David Lloyd.

The former Glamorgan man goes for a quick single, but is run out by Mason Crane's direct hit.

He's on his way for 24.

Any prospect of play imminently at Trent Bridge has been slapped down by four words on Nottinghamshire's account on X, formerly Twitter.

"It's hammering down now."

It's dried up in Essex and the covers are off. Play will get under way in about 40 minutes IF the showers stay away.

Essex have declared, meaning Kent will need 375 for victory.

Image source, Rex Features

There are showers about, but it's dry at the moment.

Yorkshire resume in their hunt for six Gloucestershire wickets... Adam Lyth will take the first over of the day!

Credit to Warwickshire captain Alex Davies, he's been trying all sorts of funky fields to try to remove Durham batters over the past couple of days.

He's got a leg slip and three more close catchers in on the leg side for Matty Potts, with Oliver Hannon-Dalby coming around the wicket to the England Test bowler.

Potts holds firm for now though and is six not out off 29 balls.