The tea interval has been called after the dismissal of Shane Snater.

Play will resume in just under 10 minutes.

Tom Bailey is back into the attack with two slips and a gully.

Grant Stewart throws his hands through the line of the second ball and edges it past second slip for four.

Tense times for Kent, who really cannot afford to lose another one in this session.

The forecast rain has arrived in Derby after an eventful post-lunch session.

Derbyshire added 94 runs in 17 overs, losing four wickets in the process.

Aneurin Donald led the way, his 44 coming in just 46 balls with nine fours, and Blair Tickner has swung away in unorthodox but effective fashion. His 22 has come in just 21 balls.

The wickets have been spread around the Sussex seamers who have generally bowled a tidy line and length.

Tea is being taken and if the forecast is correct, we may not see too much more play today.

Joey Evison is back and across to Tom Hartley, driving the spinner through cover for one to take Kent to 150 in the 55th over.

Grant Stewart then cuts Nathan Lyon through the off side for two more at the other end.

A hint of a fightback from Kent, who nonetheless are still precariously placed.

Shane Snater takes Essex to 150 with a powerful drive down the ground for four off Migael Pretorius.

Jamie Porter then gets four of his own, squeezing a full, wide ball through backward point.

The catching behind the wicket from Somerset has been of a very high standard.

That was excellent from James Rew.

With the rain still falling at Headingley, the players are taking tea.

They're also having their afternoon cuppa early at Derby after recently coming off for rain.

Somerset will be twitching after that dropped catch.

Shane Snater is in the groove now, down the track to Migael Pretorius and driving straight past the bowler's outstretched hand for four.

The much anticipated rain has arrived at Derby.

The hosts have battled to 189-8 after 44.5 overs, putting on a rapid 96 runs since lunch for the loss of four wickets.

Blair Tickner is 22 not out with and Jack Morley has five.

We may not get back out here if the forecast is true, but the weather looks well set for play over the weekend.

Some supporters aren't hopeful today as they make for the exits.

Joey Evison is down the track to Tom Hartley but can't quite push the ball through the infield.

Maiden over. Just a hint of turn there.

It's still raining in London. Tea will be taken at 3.10pm.

Will we see any play today?

Shane Snater is down the track to Jake Ball, driving to a diving Matt Renshaw at extra cover, but a tough chance is spilled.

Frustration for Somerset.

Blair Tickner is enjoying himself out there.

He steps to the leg side and takes a massive swing off Danny Lamb.

It catches the top edge and sails over the head of Sussex wicketkeeper John Simpson.

It's more village green than first-class, but these could be valuable runs for Derbyshire. He's raced to 22 off 20 balls.

It wasn't a very good shot from Simon Harmer who will be disappointed with himself and he actually kicked the ground in frustartion.

He was going for an expansive drive through the covers without much foot movement and he rather threw the bat at it.

It was a good catch moving across just in front of first slip by James Rew.

And that's another useful breakthrough for Somerset.

Four runs to Harry Duke, cutting Migael Pretorius through backward point.

Too short and wide.

Essex will still hope for 200 plus with Duke playing in this vein.

Left arm spinner Tom Hartley is in the attack for the first time (in the 47th over) and bowls round the wicket to Joey Evison.

An encouraging start for Hartley who has Evison playing around his front pad and starts with a maiden.