My goodness, that's close first up from Steven Finn. The Middlesex paceman fires one in on Tim Bresnan's pads, but Bresnan gets an inside edge on it.

Huge appeal from Finn, rightly given not out.

Ollie Rayner comes into the attack and sees his second ball driven through the covers by Gary Ballance to the boundary. Lovely strike from the England man.

However, the off-spinner keeps things tight for the rest of the over. Just the four from it. The run-rate continues to climb. It's up towards 7.5.

Steven Finn comes into the attack.

That's a really nice shot from Tim Bresnan. The burly all-rounder swings through the line and launches Tim Murtagh over mid-on to the fence.

We saw a lot of that in his knock of 142 in the first innings.

The task is becoming increasingly tough for Yorkshire now.

They've got a long tail - although saying that, it got them out of trouble in the first innings.

It's a different story this time around though. Yorkshire need quick runs.

Toby Roland-Jones has a couple of lbw shouts against Gary Ballance, but both are pitching just outside leg stump.

He's bowling seriously quickly is the big man. Fantastic first six overs.

That's a seriously good shot from David Willey. The all-rounder, promoted to three, takes a couple of paces down the track to Tim Murtagh and wallops him through the covers for four.

Yorkshire require 196 off 174 balls.

Toby Roland-Jones is bowling a super spell here. 

The right-armer sends down an absolute jaffa which zips past David Willey. He's not giving anything away.

10 overs have gone, 39 on the board. Somerset's hopes of a first title are just about hanging on.

The pressure is already growing on Yorkshire. Tim Murtagh bowls six deliveries on the money to David Willey who can't get it away.

Yorkshire need 202 off 31 overs.

That'll help Yorkshire's cause. David Willey pinches a quick single, the fielder launches the ball at the stumps but it goes through Steven Finn backing up and down to the boundary.

Five runs. Bemused looks from the Middlesex players.

The required run-rate is already approaching 6.5 for Yorkshire, as Tim Murtagh concedes just a single off his fourth.

The visitors need 212 off 33 overs.

David Willey will surely have a swing here?

It's currently tea on the south coast and Hampshire appear to be heading down.

Mark Stoneman (81 not out) and Scott Borthwick (39 not out) have resisted everything thrown at them by the hosts.

Durham need another 147 to win off a minimum of 27 overs - Hampshire need nine wickets.

It seems Peter Trego wasn't too happy with the declaration...

That's a better over for Middlesex. Toby Roland-Jones keeps things nice and tight and just two singles come from it.

Alex Lees and Adam Lyth look in an attacking mindset for Yorkshire though. They have to be.

Tom Audsley: What are the odds the players have to go off for bad light later with 40 runs to win & 2 wickets left?! Use those floodlights  

Matt Matravers: Six an over on a glorious batting day. Do Middlesex actually believe they can win it?  

The BBC's Test Match Special team are in place at Lord's. To tune into radio commentary from HQ or any of the five other grounds click on the live coverage tab at the top of this page.

It promises to be an absolute thriller.

Shot of the day from Alex Lees. The 23-year-old leans into a wide half-volley from Tim Murtagh and simply pushes it through the covers for four.

Yorkshire need 223 more off 37 overs.

That's the second boundary down to third man. This time Adam Lyth squirts Toby Roland-Jones to the ropes.

Excellent first couple of overs for the reigning county champions as they seek their third straight title.

I'd imagine those ciders are going down a little more quickly in Taunton right now.