Craig Overton strays on to Adam Wheater's legs and the ball flicks off the pad down to the fine-leg rope for four leg byes.

Wheater then gets off the mark with a push behind point. Jamie Porter also gets his first run of the morning with an awkward fend off the glove.

For the neutral it won't be a bad thing if Essex get a small lead because it means Somerset have to make the running for the rest of the game.

They're 24 behind.

Craig Overton will bowl the first over of day four from the Nursery End. Three slips in place.

Out come the players at a sunny, yet freezing Lord's.

Nightwatchman Jamie Porter and wicketkeeper Adam Wheater will resume batting for Essex.

31 runs for Essex, four wickets for Somerset. They're the key numbers if this game were to end in a draw...

You will once again be able to watch every ball from Lord's on the live video stream by clicking on the play button at the top of this page.

There is also radio commentary on BBC Radio 5 Live Sports Extra at various points throughout the day if you're on the move, or ball-by-ball commentary from BBC Radio Somerset and BBC Essex.

You can also follow the ramblings of myself and Adam Williams, who's in place at Lord's, in the live text commentary.

Don't forget to have your say using #bbccricket on Twitter.

Image source, Rex Features

Somerset seamer Lewis Gregory helped bring his side back into the game with some wickets with the second new ball, including the prize scalp of Alastair Cook.

Despite having to watch the former England captain make 172, Gregory felt his side were unlucky.

"I thought we bowled really well first up," he said.

"A couple of edges fell short of the slips and then Cook just did what he's done for a long time, he churned out the runs and unfortunately for us, he showed why he's still one of the best.

"It was nice to see the back of him before the end of the day for sure and hopefully we can get a couple more wickets early in the morning to get a lead.

"Hopefully, the first 30 minutes will go in our favour and we can build from there."

Image source, Rex Features

Alastair Cook racked up his 67th first-class career century and also ticked off a couple more landmarks in the process during his majestic 172 yesterday.

After play, he spoke about how much he's enjoyed being back in Essex colours in this truncated season.

"I've really enjoyed playing in this competition with this team, with lots to play for in every match and it's been great fun," Cook said.

"It's a good club to be at right now. The changing room is a great place to be around, the team is strong and we're winning a lot of games, so that definitely helps.

"I've not given too much consideration into how many more seasons I'll keep playing.

"I've said before I will definitely play all of next season and then we'll see what happens."

Adam Williams
BBC Sport at Lord's

Image source, BBC Sport

It still seems a very surreal experience to be inside this famous ground knowing that only a select few are allowed through the gates to see the game with their own eyes.

Outside Lord's, it looks like a regular Saturday morning in St John's Wood with people out having a jog, grabbing a coffee or just jumping on a Boris Bike.

Let's hope when the start of next season comes around in just over six months, supporters will be allowed back in to enjoy the cricket again too.

Image source, Getty Images

In summary, Friday was a day dominated by Essex's batsmen for two sessions before five wickets after tea kept Somerset's hopes of lifting the trophy alive.

Alastair Cook starred with a magnificent 172, but the former England captain fell to Lewis Gregory late in the day and Somerset are now into the bowlers.

So why's a first-innings lead crucial I hear you ask?

Well, if the game ends in a draw then the team with the best score first time around wins the trophy.

It's all set up to be a cracking morning session!

Image source, Getty Images

Morning and welcome to day four of the Bob Willis Trophy final.

The game is set up really nicely after a Somerset fighback with the ball late on day three.

Essex still need 31 with four wickets in hand to earn what could be a crucial first-innings lead.

Play coming up in 15 minutes...