Night-watchman Matt Potts sees off the last few balls of Felix Organ's over and that is stumps.

Hampshire's big score has set them up and three Durham wickets, especially that one of Alex Lees before the close, has them in a very strong position.

Durham trail by 357 and first need to reach a score of 354 to avoid following-on.

Daniel Bell-Drummond (54*) and Jack Leaning (43*) see Kent through to the close.

They've steadied the ship nicely after the early losses of Ben Compton and Zak Crawley.

Earlier, we saw Worcestershire score the second-highest total of the season with a massive 618-7 declared.

After Adam Hose's 90, it was the unbeaten partnership of Jason Holder and Matthew Waite which really took the game away from Kent.

Holder's 123 and Waite's 100 included plenty of fireworks.

No night-watchman for Surrey as Dan Lawrence has come to the middle.

Can he help Jamie Smith, who is on 90, to three figures before stumps?

Dan Mousley has the dubious honour of bowling the 80th over.

Ben Foakes goes big over midwicket and the four runs take him to a half-century.

It has taken 92 balls and is putting his side in a very strong position.

He takes a single and then Jamie Smith smashes a baseball-style shot over the legside for four.

That brings up the 300, a second batting point and means they have collected 12 from this Mousley over.

Gloucestershire opening pair Cameron Bancroft (26*) and Ben Charlesworth (23*) can bit with a fair degree of freedom such is the cushion their side has.

They've been finding the boundary fairly regularly to push their side up towards 50 runs.

The lead is 287 and we have ten overs left tonight for them to push on.

Almost a second wicket in the over for George Balderson!

A good ball to Calvin Harrison catches the edge, and it flies just beyond the reach of George Bell at third slip.

That is also a first batting point for Notts.

And then Harrison steers one down past the slips for four more. That was much more controlled.

The ever-reliable Kent skipper is digging his side out of a hole of their own making here as he reaches a half-century and takes the hosts over 100 runs.

They were 15-2 when Zak Crawley departed so it's been a good recovery.

They need plenty more good work to get near Worcestershire's total though.

A second six of the innings for Jamie Smith as he effortlessly pulls it over deep backward square for six off Ed Barnard.

And next ball, he takes one step out of his crease before unfurling a gorgeous off drive for four more.

Smith goes to 77.

He has nine overs left tonight. Can he make his hundred this evening?

Lyndon James pinches a single off the final ball of Tom Hartley's over and that is the 50 partnership between him and Lyndon James.

It has taken almost 24 overs, so it has been a struggle.

But 80 overs are now up and Lancashire are taking the new ball.

As far as Glamorgan are concerned, they will not want to lose Colin Ingram because he is an important man to try and extend this lead after over 100.

Similarly Sussex will be hoping to get him out and wrap up and then they'll think - yes in the end we have done pretty well even though we trail.

Image source, Rex Features

Warwickshire had an opening when Craig Miles removed Dom Sibley and Ollie Pope in quick succession.

But Jamie Smith and Ben Foakes have shut the door with this stand of 103.

Surrey trail by 71, but they will fancy building a large first innings lead with their batting still to come.

Northamptonshire's bowlers who put in a decent shift in the first innings, in particular Siddharth Kaul and Ben Sanderson - when they would have been hoping for a long nice rest and to put their feet up.

Instead they are going to have to bowl again. They are going to have a good hour and a bit out in the field.

The sun has gone in behind cloud at the moment but it still feels that this will be testing little session for Northamptonshire.

They need to keep concentrating, they need to try and make a few inroads and get themselves back into the match but they are going to need a very strong final session.

Sussex strike twice to give themselves a flicker of hope after a long hard day in the sun.

Alex Lees plays one into the legside off Liam Dawson to reach a nicely compiled half-century.

It has come off exactly 100 balls.

He has one century to his name this summer and his team need him to go big again.

Jacob Bethell drops short and Jamie Smith fairly pumps it over cow corner for a six - the first of the innings.

That brings Smith up to 50 off 65 balls. What a dangerous player he is.

It also takes the total past 250 and the side's first batting point.