With only six overs to go before the new ball is due, Somerset call up Lewis Goldsworthy for a short spell.

Essex are currently reaping the benefits of a positive approach - especially from Charlie Allison - but they settle for a couple of singles in that over.

This has been a frustrating 10th wicket partnership, worth currently 16, which Glamorgan are struggling to break at the moment.

Josh Hull has been watchful at one end while letting Tom Scriven add runs to Leicestershire's total - it is a dynamic which is working for the home side right now.

Postpublished at 15:10 BST

15:10 BST

Derbyshire v Durham 150-1 - lead by 277

Back-to-back sixes from Ben McKinney who goes down town and hammers Shoaib Bashir back over his head to move onto 89 not out.

That also brings up Durham's 150 and the 150 partnership between McKinney and Will Rhodes.

A powerful pull shot through deep mid-wicket from George Hill races to the boundary and sees him move to 34 not out.

for Charlie Allisonpublished at 15:06 BST

15:06 BST

Somerset v Essex 212-3 - trail by 99

There's that Charlie Allison reverse sweep again and for the third time it brings him four off Archie Vaughan.

A more elegant approach next ball as he steps down the pitch and drives to the long-off boundary.

Allison's 50 arrives from 88 balls as he unfurls the reverse for the second time in the over and once again it brings him four.

It's risky - but highly entertaining.

We are underway in the fourth innings of this intriguing match, and Surrey's chase.

Brett Hutton is tight with the ball in his opening over, from which Rory Burns took a single.

50 for Will Rhodespublished at 15:05 BST

15:05 BST

Derbyshire v Durham 136-1 - lead by 263

Will Rhodes turns one into the legside for a couple and that brings up his 50.

The 31-year-old left-hander raises his bat for a half-century that has come off 92 balls as his side have taken complete control of this one.

James Rew is having a difficult day behind the stumps.

Archie Vaughan finds turn and bounce and Rew is unable to take the ball up by his left shoulder - a couple of byes for Essex.

Slightly too full from Jaydev Unadkat and that's a stylish cover drive from Zen Malik, which brings him four runs.

Dan Mousley is his new partner following the dismissal of Rob Yates.

A crunching pull shot through mid-wicket by Will Rhodes sees him move on to 47 not out and Durham's lead move past the 250-mark.

Rhodes' partnership with Ben McKinney is now worth 125 after Alex Lees was dismissed with the first ball of the innings.

George Hill squeezes one through mid-wicket for two and that sees Yorkshire's lead move on to 250.

A single in the following over by Dom Bess means the ninth-wicket partnership is now worth 50.

Postpublished at 14:54 BST

14:54 BST

Somerset v Essex 193-3 - trail by 118

Fearless stuff from Charlie Allison, who takes a couple of paces forward and hits Jack Leach straight down the ground for a maximum.

There is a short delay while the ball is retrieved and the next one forces Allison to defend.

Shoaib Bashir is into his fourth over for Durham, currently on figures of 0-10.

With Durham going at a rate of just under four-an-over, Ben McKinney has moved onto 66 not out while Will Rhodes is seven runs short of his half-century with the pair looking perfectly set.

If the visitors keep this up, a Durham declaration may be on the cards in the final session of the day you feel.

50 for Ricardo Vasconcelospublished at 14:52 BST

14:52 BST

Lancashire v Northants 75-0 - lead by 222

A crisp punch through the covers gets three runs for Ricardo Vasconcelos as he runs hard and that is an ultra-positive half-century.

It's come off 48 balls and it's his first of the season. Although every time he has reached 50 this season, he has gone on to three figures.

You would not bet against this becoming century number four.