Somerset bowled out for 301
Byrom makes 117, Overton 66
Sam Cook claims 5-76
Somerset lose last five wickets for 35
Byrom 88, C Overton 33
Image source, Rex FeaturesChange of end for Simon Harmer, but still no luck as Craig Overton edges one past backward point and down to the rope.
It's Overton's sixth boundary as he moves into the 30s.
Byrom 88, C Overton 29
Paul Walter replaces Simon Harmer and the big left-arm seamer concedes just a couple of singles.
Essex need a breakthrough and fast. Harmer is switching ends...
Byrom 87, C Overton 28
Somerset bring up their 200 with a couple of singles off Dan Lawrence's first over.
Essex have taken just one wicket this morning in 90 minutes of play.
Byrom 86, C Overton 27
Part-time spinner Dan Lawrence is coming into the attack for Essex.
Byrom 86, C Overton 27
Image source, Getty ImagesEssex just can't stop leaking boundaries.
Simon Harmer bowls five dot balls but Eddie Byrom finishes the over by stroking the spinner to the mid-wicket rope.
Byrom is 14 away from a magnificent hundred.
Ravi Bopara
Former Essex and England all-rounder on BBC Radio 5 Live Sports Extra
The 50 partnership has come at a good time, it's a great counter punch from Somerset after the way Essex started with the ball especially in that first half hour.
They were all over Somerset and picked up that wicket that they were looking for but since then Somerset have put those 50 runs on in no time.
Beard 11-1-68-1
Aaron Beard has been expensive. The 22-year-old has conceded 68 runs from his 11 overs.
Five come off his latest, which included a no-ball.
Somerset 189-5 v Essex
Adam Williams
BBC Sport at Lord's
Image source, PA MediaSome spectacular pictures of the ground being taken on this second day.
This one from the top of the Mound Stand shows just how much building work is going on behind those Nursery End sightscreens.
It sounds like an episode of Bob The Builder at times when they construction workers start hammering away and moving building materials!
Byrom 79, C Overton 27
That's the fifty partnership between Eddie Byrom and Craig Overton in just 10 and a bit overs. Are Somerset beginning to take control?
Byrom 78, C Overton 26
Runs are beginning to flow.
Craig Overton starts Aaron Beard's over with a lovely clip for four before the Essex paceman hits him on the pads but the umpire shakes his head.
Overton finishes the over with a drive which pulls up just inside the rope. Three more. Another expensive over worth nine.
Byrom 77, C Overton 18
Too short from Simon Harmer, cold fingers maybe, and Eddie Byrom pulls the spinner away for four.
Byrom finishes the over with another boundary, this time a sweep.
Expensive.
Byrom 69, C Overton 17
Somerset are beginning to tick along nicely at Lord's.
Craig Overton clips Aaron Beard off his legs to the boundary and Eddie Byrom follows it up with a couple more runs through point.
Seven off the over in total. Here's Simon Harmer...
Byrom 67, C Overton 13
Time for drinks.
Who's on top here then? I still can't call it.
If you think you can, get in touch using #bbccricket on Twitter.
Byrom 66, C Overton 12
Aaron Beard is fuming as Craig Overton slices him in the air down to the third-man boundary. How many runs have been scored down there in this innings?!
Jamie Porter will continue from the other end.
Vic Marks
Ex-England spinner on BBC Radio 5 live Sports Extra
Image source, Rex FeaturesCraig Overton is settling in, if he gets in he's dangerous.
Eddie Byrom's progress has been no more than steady this morning but Somerset are increasingly indebted to him.
Byrom 65, C Overton 8
Lovely shot from Eddie Byrom.
The Somerset left-hander strokes Sam Cook through mid-on for his 11th boundary.
He moves up to 65 with a single. Time for a bit of Simon Harmer maybe?
Byrom 60, C Overton 8
Almost six down!
Craig Overton prods forward to a full one from Aaron Beard, edges, but it goes through second slip and down to the fence. I think it just fell short of the fielder.
Byrom 59, C Overton 4
Sam Cook goes past Craig Overton's outside edge with an absolute jaffa.
Just a single off the bat of Eddie Byrom. This game is right in the balance as Aaron Beard comes into the attack, replacing Jamie Porter.
Byrom 58, C Overton 4
Craig Overton gets off the mark by clipping Jamie Porter off his legs to the boundary.
Lovely shot as five come off Porter's 19th over.
Porter and Sam Cook have bowled 41 of the 52 overs in this innings.
Somerset 139-5
Adam Williams
BBC Sport at Lord's
Image source, Rex FeaturesAdmittedly, that title might not take off as a television programme, but here's my first submission in the series.
Former England captain Mike Atherton has the honour of getting it started.
Here he is taking in the game from his solitary position in the top tier of the famous Lord's Pavilion.