Image source, Rex Features

That's the close at Essex.

Jamie Porter grabbed the crucial wicket of Ross Taylor for 146 late in the day, so it's probably just about honours even.

Image source, Rex Features

Ollie Pope is finishing day one with a flourish as the 20-year-old adds another couple of boundaries off Tom Abell.

He's up to 71. Two overs to go at Guildford.

Sussex have reached 406-5 against Durham at Arundel. Luke Wright departed to a full toss from Cameron Steel, while Harry Finch was caught behind off Matt Salisbury to give the visitors a glimmer of hope after a tough day in the field.

An unbeaten century from Colin Ackermann has helped Leicestershire to recover to 304-6 against Middlesex at Grace Road after losing their fifth wicket on 198.

Warwickshire are struggling on 106-8 against Kent at Tunbridge Wells. The home side's 197 looks competitive at this stage. Jonathan Trott and Henry Brookes are battling hard in the middle.

Glamorgan are 121-6 against Derbyshire at Swansea. It could've been far worse but for a stand of 58 between Chris Cooke and David Lloyd.

Northamptonshire raced to 99-0 in the first 18 overs of their day-night match against Gloucestershire at Northampton, but the visitors have fought back well to keep them to 234-6 after 57 overs.

Notts bring up their third batting bonus point.

Tom Moores has got his skates on in the last few overs, three boundaries have taken him up to 25.

Ross Taylor has been at the crease for four and a half hours now - he's 141 off 202 balls. An innings of pure class.

Lancashire are rattling along at New Road now.

Alex Davies has hit a flurry of boundaries to move to 38 and the deficit is already down to 187.

England opener Keaton Jennings is looking solid at the other end.

Where is Worcestershire's inspiration going to come from?

It's been a day to remember for Sussex batsman Tom Haines.

Not only did the 19-year-old score his maiden first-class century, he also got to chat to BBC Sussex's Adrian Harms...

We've seen plenty of fifties today, but this could be the best of the lot.

Ollie Pope brings up his half-century off 60 balls with 10 fours.

He's only played 12 first-class games, but his career batting average has just nudged past 60. Decent.

Jonathan Trott (31 not out) is battling hard to keep Warwickshire in the game against Kent at Tunbridge Wells, where the visitors are reeling on 77-8 after dismissing the home side for 197.

Colin Ackermann has reached his 16th first class century at Grace Road, where Leicestershire have reached 289-6 against Middlesex .

Glamorgan have recovered slightly to 104-5 after being reduced to 52-5 by Derbyshire at Swansea. Chris Cooke and David Lloyd are the men in the middle.

Northamptonshire have reached 220-6 against Gloucestershire in the day-night match at Northampton.

Durham have checked the progress of Sussex at Arundel with two wickets for four runs thanks to Matt Salisbury and Cameron Steel to leave the home side on 364-5. Philip Salt and Tom Haines top-scored with 130 and 124 respectively.

Don't forget, we'll have county cricket right through until about 21:30 BST, with the two day-night games taking place at Hampshire and Northants.

Jay Freeman will be replacing me in 45 minutes or so to cover those games.

Meanwhile, Mr Pope has brought up his half-century at Guildford...

Notts are digging in at Chelmsford.

Tom Moores and Ross Taylor have only scored 16 runs since Moores came in about 40 minutes ago.

10 overs to go for the day.

Image source, Rex Features

It really is a youthful scene at Guildford.

Will Jacks, currently batting for Surrey with Ollie Pope, is only 19.

Surrey have two teenagers in the side and a pair of 20-year-olds. Great to see.

They also have Rikki Clarke, Morne Morkel and Jade Dernbach to come... that raises the average age slightly!

Image source, Rex Features

Matt Taylor's 3-48 has kept Gloucestershire in the day-night match at Northampton, where Northants have reached 209-4.

Sussex are dominating with the bat at Arundel and now have 356-4 against Durham. Harry Finch survived being bowled by Matt Salisbury on 24 when the ball didn't disturb the bails and he's now unbeaten on 54.

Glamorgan are in big trouble against Derbyshire at Swansea, with just a lowly 71-5. Tony Palladino has three wickets and Glamorgan keeper Chris Cooke is 23 not out.

Warwickshire have struggled at Tunbridge Wells, where Kent have reduced the visitors to 65-7. Harry Podmore is demolishing the lower middle order and tail, with three wickets in three overs so far.

Leicestershire have batted watchfully at Grace Road after losing two wickets for just four runs shortly before tea and now have 262-6 against Middlesex. Colin Ackermann is 97 not out.

Gary Ballance joins his younger partner in reaching his half-century.

He does it in some style too, pulling West Indian paceman Fidel Edwards for six.

This has been some recovery with teenager Harry Brook - the pair have put on 117 for the fourth wicket.

Simon Harmer has really turned the screw for Essex.

The South African spinner has only conceded 44 runs off his 20 and a bit overs.

And he's picked up two key wickets.

Meanwhile Ross Taylor is an unmovable rock at one end - the New Zealand international is on 130.

Lancashire openers Keaton Jennings and Alex Davies are getting into their stride now.

Both have three boundaries apiece - Worcestershire need a wicket or two in the 20 overs remaining on day one at New Road.