Migael Pretorius gets the ball to keep a bit low outside off stump but Dom Sibley is still there, unbeaten on 46.

He moves to 47 and keeps the strike with a push to deep third going forward.

Matthew Waite has a huge stoke of luck as he top-edges a pull off Codi Yusuf but the diving Jack Blatherwick is unable to cling on at deep square.

The lead is 84 and every run feels precious...

Derbyshire 451-8 v Middlesex

The hosts have surpassed 450 and already have a mammoth lead.

Alex Thompson came in to replace Martin Andersson, but fell on just three runs to Zafar Gohar, caught behind by Jack Davies.

Middlesex will be desperate to get Derbyshire all out and have a crack at chasing down a massive total.

Farhan Ahmed has been tidy in this spell but he won't be happy with this ball, which is full, wide and carved away to point by Tom Haines for four runs, taking the Sussex opener to 45.

Sussex are 64 behind on first innings.

Josh Tongue is in the attack for the first time this innings, bowling round the wicket to the left-handed Dan Hughes, who gets a single into the off side.

Tom Haines is almost foxed by one ball, which he plays around to drop it into the on side.

He'll keep the strike with a leg bye off the last ball of the over.

Jamie Smith is into a nice rhythm here, getting forward to Kasey Aldridge to drive with immaculate timing through point for two.

He picks up four next ball, driving Aldridge down the ground.

He's nearly undone by a leg cutter, dropping his arms and bat as the ball whizzes past off stump to keeper James Rew.

Nathan Fernandes had his revenge against Martin Andersson, who gets down on one knee to try and sweep the spinner away, only to miss the ball and see his stumps rearranged.

He departs for a career-best 107 and Derbyshire are 445-8 against Middlesex, having been put in at Derby.

A bit of width for Tom Haines, who cuts Fergus O'Neill through backward point for four. He's on 38 after being dropped at slip on 34.

He'll get one more run, tapping the ball through point on the front foot.

Kasey Aldridge bowls over the wicket to Jamie Smith, who blocks into the off side.

He drives and is beaten outside off fourth ball and gets a single off the fifth, playing away from his body and into the off side.

Runs have slowed to a trickle.

Dom Sibley is squared up and beaten outside off to end the over.

This ball is nipping away off the seam.

Haines dropped on 34published at 14:49 British Summer Time 26 April

14:49 BST 26 April

Notts 300 v Sussex 169 & 51-0

Tom Haines is forward to Fergus O'Neill on 34...

Edged off the top half of the bat and dropped at first slip by Joe Clarke.

Low chance but certainly a life for Sussex.

Haines is subsequently beaten outside off stump but sees out the over.

HUGE shout for lbw from Jake Ball and every Durham fielder and Henry Nicholls might have got away with one on 20.

It's hit him halfway up the pad and it looks destined for middle and leg.

A break for the Pears.

Contrasting but equally effective innings for this Surrey pair with Dom Sibley 43 not out off 123 balls and Jamie Smith scoring a run-a-ball 14 to date.

Sibley survives an LBW shout from Lewis Gregory who strikes the pad halfway up but just outside off.

Just the one run off the over and Somerset are exerting some control after dismissing Rory Burns and Ollie Pope in quick succession.

Dave Fletcher
BBC Radio Derby Sport

Congratulations to Martin Andersson, he's held this together well throughout the day, first with Luis Reece, then with Zak Chappell.

Derbyshire have started to accelerate.

Brett Hutton is off the field after pulling up in his fifth over.

So Notts are a bowler down in the midst of a sprightly Sussex start to the second dig.

Tom Haines takes the opening stand to 50 in the 10th over with a clip to the leg side for one off Fergus O'Neill.

81 behind.

100 for Martin Anderssonpublished at 14:40 British Summer Time 26 April

14:40 BST 26 April

Derbyshire 422-7 v Middlesex

This one will mean a lot.

Derbyshire all-rounder Martin Andersson posts his second century in three matches, and it comes against his former club.

He cuts away Nathan Fernades for his 15th four to bring up three figures from 156 deliveries and with it, a new career best, beating the 101 he made against Leicestershire two weeks ago.

Shot! Four more runs to Jamie Smith, standing tall and driving Lewis Gregory through cover with a high elbow. Lovely balance.

He turns the next ball off his hip for two and that brings up the Surrey 150 in 41 overs.

Tom Haines has his sixth four, but it's streaky!

He's half forward to Fergus O'Neill, with an angled bat, inside edging past his leg stump.

So frustrating for Notts.

The run rate remains at near enough five an over and the innings gap is down to 93.