50 for Alex Leespublished at 14:58 British Summer Time 30 August

14:58 BST 30 August

Somerset 492 v Durham 122-2

Image source, Getty Images

Alex Lees brings up his half-century from 101 balls and Durham would dearly love him to convert that into three figures - as he did in the last round against Nottinghamshire.

Lees' progress was aided by a generous couple of overs from Andy Umeed, which cost 16 and included a couple of full tosses - both of which were duly dispatched to the fence.

George Hill swings Luke Hollman over midwicket for six to bring up the 600 - and that is the cue for captain Jonny Tattersall to wave the batters in.

Hill finishes on a career-best 169 not out, with Dom Bess unbeaten on 60 and Yorkshire will have 14 overs to bowl at Middlesex before tea.

100 for Sai Sudharsanpublished at 14:55 British Summer Time 30 August

14:55 BST 30 August

Notts v Surrey 523-9

Sai Sudharsan takes the aerial route to Farhan Ahmed and he dispatches the ball over the ropes to bring up his century.

That is his first six to go with 10 fours as the landmark comes off 176 balls.

He is the seventh batter to make a Championship hundred for Surrey this summer.

50 partnershippublished at 14:53 British Summer Time 30 August

14:53 BST 30 August

Lancashire 69-1 v Hampshire 389

Keaton Jennings and Josh Bohannon have played themselves in for Lancashire and benefitted from Kyle Abbott and Mohammad Abbas going off.

Their partnership is up to 57 with Jennings on 38 and Bohannon, 25.

50 for Dom Besspublished at 14:49 British Summer Time 30 August

14:49 BST 30 August

Yorks 583-6 v Middx

Dom Bess becomes the fourth Yorkshire player to pass 50 in this innings - although two of them, including his current batting partner George Hill, have gone on to make big hundreds.

It's the 19th time Bess has passed 50 in his first-class career and the first this summer.

He takes a single off Sam Robson to reach the landmark from 65 balls.

Joey Evison is too straight and Will Rhodes tucks it behind square for four to the short boundary.

He really has cashed in on that part of the ground - he has struck 30 fours in this innings.

This is now his best score of the season, beating his 178 not out against Durham in April.

Image source, Getty Images

Sussex skipper John Simpson has just got out for 121 after completing his fourth century of the season.

Team-mate Jack Carson is eyeing a century on 86 not out as the hosts close in on 600 runs against a dispirited Derbyshire.

Glamorgan have moved into the lead against Leicestershire at Sophia Gardens.

Colin Ingram, unbeaten on 133, is a big reason as to how they have been able to do that.

Liam Patterson-White drops short and Conor McKerr helps himself by pulling it legside for four.

The Surrey 500 comes up, although they are not in the greatest hurry.

Image source, Rex Features

Applause for George Hill, who passes 150 and then adds another couple to overtake his previous highest first-class score - an unbeaten 151 against Northamptonshire two years ago.

Hill has put on 80 with Dom Bess, who is 35 not out and Yorkshire are advancing steadily towards 600.

A 50 partnership between Tom Westley (68) and Paul Walter (29) has moved the hosts past the 200 mark.

The Essex ship did need steadying and they have done just that to move their side within 66 runs of the Pears' total.

After eight overs apiece from Kyle Abbott and Mohammad Abbas either side of lunch, we have the first change in the Hampshire attack.

John Turner replaces Abbott with his height and bounce. But he is too short on his second ball and Keaton Jennings welcomes it by pulling it for four as the over goes for six.

Then there is a change at the James Anderson End with James Fuller introduced.

His first ball is overpitched and Josh Bohannon helps himself to four.

Fuller's over goes for six and it helps the scoreboard to start moving a bit more.

A change of angle for Jack Leach, who's switched to around the wicket against this left-handed Durham pair.

But it's still young Archie Vaughan who is really catching the eye - he fizzed an absolute beauty of an off-break just past the edge of Alex Lees' bat just now.

Durham are progressing well, though, with Lees on 34 and Scott Borthwick 35.