Meanwhile, Somerset have won the toss at Taunton and decided to put Surrey in.

We're just about getting under way across the board, so let's crack on with some more cricket...

A good morning for Sussex adding 111 for the loss of Stiaan van Zyl and Travis Head.

Batting hasn’t been easy with the floodlights on throughout the session, and heavy cloud hovering above the ground.

Darren Stevens has been the pick of the Kent bowling, but Sussex have batted sensibly waiting and dispatching the occasional loose ball, and look well placed to build a decent first-innings lead.

Kevan James
BBC Radio Solent

Nick Gubbins (50 not out) and Blake Cullen (22 not out) have steadied a pretty unsteady Middlesex batting performance this morning.

Resuming on 90-4, John Simpson (20) went without adding to his overnight total. Andersson (five) went first ball after a short break for bad light. Harris quickly went for a duck.

When the clouds are low, two bowlers you don't want to face are Abbott (4-29) and Abbas (2-36), who shared the three wickets.

But Gubbins has hung in there, attacking when he can and 19-year-old Blake Cullen has given him some more than useful support.

Nick Gledhill
BBC Radio Essex

Alastair Cook and Nick Browne made up for the loss of yesterday’s play with a comfortable unbeaten century stand that took advantage of a flat performance from the visitors.

Cook will be slightly disappointed with his return so far this season but he rarely look troubled against an attack which frequently over pitched or offered width.

Browne has built on a remarkable career record against Derbyshire. He now averages 283 against his favourite opponent. Only Dustin Melton impressed for Derbyshire once he replaced Billy Stanlake, who struggled on debut with six no balls in his opening spell.

These Chelmsford games are important for an Essex side that has struggled on the road in what has proved a tough group. With a slightly improved weekend forecast their best hope is to to bat once and enforce the follow on.

Ffion Wynne
BBC Radio Wales

Wickets tumbling here in Cardiff as Glamorgan have slipped from 69-2 to 77-6 at lunch – including a spell of four wickets for four runs.

Having lost Joe Cooke and Marnus Labuschagne early, David Lloyd continued his impressive run of form at the top of the order to make 31 and Billy Root made 23 to rebuild the innings on yet another difficult pitch for batting.

But, in an eventful 20 minutes before lunch, captain Steven Patterson (2-15) and medium-pacer Harry Brook (2-4) found some variable bounce and swing to rip through Glamorgan’s middle order.

This is now looking much more like the first session Yorkshire would’ve wanted after winning the toss in overcast and bowler-friendly conditions - and disappointment for the home side, who had battled hard for much of the morning.

A special mention must also go to young wicketkeeper Harry Duke, making an impressive first-class debut so far, as his tactic of standing up to the pace bowlers led to the huge wicket of Labuschagne earlier this morning.

And that's lunch at Lord's too.

An important 47-run stand for the eighth wicket has proved important for Middlesex, who at 100-7 looked in danger of being really blown away.

They still need a good afternoon session.

A cracking morning for Essex.

They lost the toss yesterday morning but a day later have dominated the first session of the match.

Alastair Cook and Nick Browne have scored at a very good clip, above four an over.

Sussex are ahead on the south coast and will look to build up a substantial lead this afternoon.

A sprightly 52 from Stiaan van Zyl lit up the morning for a while.

Now down to the middle order to try and bat Kent out of the game.

Glamorgan were going well at 69-2 but got stuck and lost four wickets for just four runs.

They're now in a huge hole in Cardiff.

Very much Yorkshire's morning after winning the toss.

for Nick Gubbinspublished at 13:11 British Summer Time 14 May 2021

13:11 BST 14 May 2021

Middlesex 145-7 v Hampshire

Well played, Nick Gubbins. His side needed a knock from him today and they've got one.

He brings up his fifty off 116 balls, including six fours, and he's also approaching a half-century stand with Blake Cullen (22 not out).

Two wickets for Chris Rushworth at the Riverside and the removal of Jake Libby by Ben Raine have made it an even game.

Durham made good progress down the order yesterday and Worcestershire will hope they can share a good partnership this afternoon.

This has been a good mini-fightback from Nick Gubbins and Blake Cullen, who have so far put on 32 for the eighth wicket after those earlier three fell for nine runs.

Remember, lunch will be taken later than usual across the board because of the revised playing conditions after so much play was lost to the weather yesterday.

Kent have taken a couple of morning wickets but have so few runs to work with.

As such, Sussex are into the lead at Hove.

A couple of times this season they have been ahead at halfway only to lose.

This here is a chance to put the game to bed, which they might be able to do with a score of 300-plus.

for Alastair Cookpublished at 12:51 British Summer Time 14 May 2021

12:51 BST 14 May 2021

Essex 119-0 v Derbyshire

Ali Cook and Nick Browne have gone skipping along this morning at Chelmsford.

Cook is first to fifty, pulling Billy Stanlake through midwicket for four and then working a single to long leg.

A half-century in 72 balls and just his second time past fifty this season.

Browne soon follows him in 93 balls.

David Lloyd and Billy Root had moved the home side into a steady spot in Cardiff.

But Lloyd shouldered arms to Steven Patterson and lost his off bail to one that nipped back.

Patterson has then got one to go away and take the outside edge to first slip.

Now much more like the morning Yorkshire were hoping for having won the toss.

A second wicket of the morning for Chris Rushworth.

A full nip-backer traps Tom Haynes lbw.

Durham's morning so far - especially with Jake Libby gone.

up for Essexpublished at 12:34 British Summer Time 14 May 2021

12:34 BST 14 May 2021

Essex 100-0 v Derbyshire

He was compared to Don Bradman a few weeks ago and Alastair Cook is at it again here.

He hold the pose in driving Matt Critchley through cover and again to Alex Hughes.

Cook and Nick Browne have helped bring the hundred up in quick time.

A great morning for the defending champions.

Darren Stevens has picked up the Australian Travis Head this morning but Sussex have gone skipping along.

Stiaan van Zyl is a very attractive player to watch and he's got eight boundaries to his name.

It won't be too long until the home side are in the lead.