Essex earn draw to win title despite collapsing after tea
Jack Leach took 5-32 before Somerset forfeited second innings
Marcus Trescothick on field as sub fielder at end of game before retiring
Gloucs & Northants promoted after Glamorgan game abandoned
Final day also washed out at Canterbury, Edgbaston, The Oval and Hove
Azad 44, Ackermann 40
Liam Hurt bowls wide of off stump and Azad punches the ball through point for four. He's on 42.
A single off the last ball so Azad keeps the strike.
Lancashire leg-spinner Matt Parkinson is in the attack and Azad clips the fifth ball to long on for one.
The runs have dried to a trickle and the draw is ever more likely.
A Cook 27, Westley 2
The ball lobs up to leg-slip and the Somerset fielders claim the catch.
Bowler Dom Bess doesn't seem over-enthused, though, and neither is the umpire. Tom Westley survives.
A Cook 26, Westley 2
Another over ticks by. No runs for Essex, but that doesn't matter. All they need to do is bat time. The onus is entirely on the Somerset bowlers to take wickets.
Dave Fletcher
BBC Radio Derby Sport
"The sun is now officially out once again at Lord's."
Middx 260 v Derbys 221-5
Just a short delay as it turns out.
Ethan Bamber is bowling to Leus du Plooy.
Azad 38, Ackermann 40
Liam Hurt drops short and Azad pulls the ball through square leg for four to take the lead past 100.
At the other end Bohannon bowls a very full length and Ackermann squeezes the ball out to mid on.
Ackermann is beaten on the inside edge by a swinging delivery but survives.
A Cook 26, Westley 2
Dom Bess drops short and Alastair Cook cuts it away for four to take the Essex total to 50. In these circumstances, and on this pitch, that was a bit of a gift.
Vic Marks
Ex-England spinner on BBC 5 Live Sports Extra
"You've got to get them early, even when the ball is spinning. If a batsman gets in for 15-20 minutes, he starts to feel more confident.
"Not a bad man to have in this situation, Alastair Cook. You probably wouldn't swap him for anyone else in the County Championship."
A Cook 22, Westley 2
Dom Bess again and Alastair Cook misses an attempted sweep. How close to leg stump was that?
Bess finds turn and bounce later in the over, but Cook is unfazed and watches it into the gloves of the keeper.
Azad 34, Ackermann 39
A bit of swing again for Josh Bohannon but there's enough width for Azad to leave.
A leg side ball runs off a thick edge to fine leg for four.
A Cook 22, Westley 2
Two singles from the latest Jack Leach over. No sign yet of a switch to seam by Somerset.
Middx 260 v Derbys 221-5
That on-drive might be the last scoring stroke of the season at Lord's.
It's too dark and rain is falling. Again.
The most minuscule of mini sessions of play ends.
About 22 minutes by my watch.
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A Cook 21, Westley 1
A rare boundary as Alastair Cook flicks Jack Leach away through mid-wicket with excellent timing.
Tom Westley's face is a mask of intense concentration as he comes onto a strike after a single, but there's nothing he can do with one which pitches on leg and turns past his bat.
Happily for Westley, there was no nick.
Great to see Marcus Trescothick out on the field in whites - and hi-vis bib - on his final day as a player, even if he is only delivering protective equipment.
Image source, Getty ImagesDu Plooy 65, Critchley 11
Ethan Bamber hustles in and bowls a bit wide of off stump and Du Plooy drives through the off side for four.
A Murtagh short ball is hooked for one by Critchley safely to backward square leg.
One more for Du Plooy after another short ball.
I hate to say this but the ground staff are hovering on the boundary edge...
Shot! Critchley drives Murtagh wide of mid on for four.
A Cook 16, Westley 1
There's a single to Alastair Cook as the ball ricochets away off the forward short leg fielder.
Dom Bess is certain he has Tom Westley with his final delivery, but the umpire declines the lbw shout.
Azad 26, Ackermann 39
A bit of swing for Bohannon and Ackermann is upright in defence.
Maiden over.
Liam Hurt drops short and Azad pulls off the hip to fine leg for one.
One more to Ackermann with a nudge in front of square.
A quicker ball hurries Ackermann into a block.
A Cook 15, Westley 1
Jack Leach rips his first two deliveries past the edge of Tom Westley's bat as the Essex batsman pzsuhes forward tentatively. He looks more secure thereafter but it's a maiden - Leach's fourth.
A Cook 15, Westley 1
We are back out after lunch at Taunton and Alastair Cook pushes the first ball from Dom Bess wide of the slips for a single.
Tom Westley picks up his first run with a flick down to backward square leg.
The final two balls of the over are pitched up too far, giving them no chance to spin, and Cook smothers comfortably.
Middx 260 v Derbys 202-5
Ethan Bamber bowls...
Harvey Hosein pushes forward. There's a bit of shape away and the batsman edges to Dawid Malan at second slip.
The new batsman is Matt Critchley.
Azad 25, Ackermann 37
Liam Hurt is in the attack and Azad drives down the ground to take the Foxes past 100.