Somerset have spent plenty of time in the field after enforcing Sussex to follow on.

Their second innings is finally under way now though and what a start it almost was for the visitors...

Lewis Gregory has a slash at one outside off stump from Ollie Robinson and he's caught at second slip...

But the umpire signals for a no ball as Robinson oversteps the line.

Nick Webb
BBC Radio Wales

Northants have battled hard on day three after starting 190 runs behind, with the visitors looking set to at least avoid the innings defeat although they have now lost Saif Zaib for 71, caught at slip off James Harris after a battling knock.

Captain Luke Procter played a solid and lengthy innings of 56 off 131 balls before Asitha Fernando had him caught behind, adding 64 with Zaib for the sixth wicket.

Zaib started brightly but moved down a gear in a gentle half-century partnership with the obdurate Lewis MacManus, on a ground where the wicketkeeper knocked up 168 not out last year.

Still likely to be a three-day finish, but Glamorgan have been forced to work for it.

Fairly slow going for Yorkshire at The Oval at just over two an over, but they won't mind it one bit all the while they're not losing wickets.

James Wharton has moved onto 27, while Jonny Tattersall is nine not out.

Leicestershire's task of chasing down 102 to beat Middlesex at Lord's begins.

Rishi Patel gets off the mark with a single in the first over from Toby Roland-Jones.

Some of the games are still in play but lets take a look at the state of play at tea:

Division One

• Durham 598-7 v Notts 407
• Somerset 338 v Sussex 152 & 335
• Surrey 512 v Yorkshire 255 & 65-2 - in play
• Warks 194 & 157-7 v Hampshire 300 & 203 - in play
• Worcs 358 & 134 v Essex 157 & 82-6 - in play

Division Two

• Glamorgan 424 v Northants 185 & 222-7 - in play
• Glos 516 v Kent 424 & 37-0 - in play
• Lancashire 458 v Derbyshire 314
• Middlesex 232 & 143 v Leics 274 & 1-0 - in play

The third new ball is available, but Haseeb Hameed opts not take it for the last over before tea.

Rob Lord continues and Graham Clark unfurls a drive down the ground to the penultimate ball of the session and picks up two to go to 97.

He cuts the final ball and runs hard but can only get two. He'll go to tea on 99!!

The declaration can't be too long away after tea. Durham are 182 ahead with four sessions of the match remaining.

Anthony Gibson
BBC Radio Somerset at Taunton

A battling innings of 82 not out from their skipper John Simpson has given Sussex just a sniff.

In partnerships of 66 with James Coles, 78 with Fynn Hudson-Prentice and 44 with Ollie Robinson, he kept the Somerset bowlers at bay for the better part of four hours.

It took Matt Henry with the new ball to make the crucial breakthrough when he sent Hudson-Prentice's off stump cart-wheeling, although it was Jack Leach who took the final wicket, having Robinson caught at slip, to finish with 4/51.

On a flat pitch, Somerset ought to knock off the 150 they need without too much trouble, but with this collapse-prone Somerset top order, you never know.

Mark Church
BBC Radio London commentator

It's still a big job on the hands of Yorkshire here.

They've just got to stick in there.

It's been some good fielding from a Surrey point of view, especially in the slips.

Foakes, as always, has been very good behind the sticks.

Durham have lost Brydon Carse, bowled by Liam Patterson-White for a six-ball duck.

On the hosts bat. Perhaps they're giving Graham Clark the chance of a century.

He picks up the ninth boundary of his innings off Rob Lord and goes to 94.

George Drissell has five.

Image source, Getty Images

In we go for tea at Taunton following the end of Sussex's second innings.

Worth mentioning John Simpson's fantastic knock for the visitors as he was left stranded with an unbeaten 82.

Will there be enough time for Somerset to win the game on day three? Or can Sussex cause a scare and threaten an unlikely victory?

We'll start to find out in about 20-odd minutes.

Anthony Gibson
BBC Radio Somerset

A good catch by Craig Overton on the outside edge, Somerset have all the time in the world to get the runs.

The wicket is very flat.

Simpson has led this staunch Sussex rear guard and has given his side a small hope.

Ben Aitchison has 45 and goes big off Tom Hartley trying to reach fifty.

He's caught in front of the midwicket boundary and goes.

An important 63-ball innings, with six fours and two sixes.

Lancashire have a 144-run lead on first innings and that's tea.

Blair Tickner guides James Anderson's fourth ball tentatively over the head of Keaton Jennings at slip and it runs away for four. Not convincing.

They need one more to avoid the follow-on.

And there it is! Tickner strokes the next ball through mid-off for back-to-back fours.

They're taking tea at Lord's after Middlesex's second innings comes to an end.

A job well done today for Leicestershire and they'll want to come out and knock these off before the close of play.

Dave Fletcher
BBC Radio Derby Sport

George Bell with a simple catch.

This will be fascinating now, Aitchison will be joined by Blair Tickner who is capable.

It was a 68-run partnership, Anderson claims his third and he's on the prowl for his fourth.