James Anderson takes 5-76 for Lancashire, but Somerset's Tom Abell makes career-best 151
England's Ben Duckett hits 177 for Notts against Middlesex at Lord's
Hampshire captain James Vince makes 186 against Northamptonshire.
Tom Westley and Nick Browne score hundreds for Essex against Kent.
Yorkshire seamer Ben Coad takes 5-54 against Sussex at Hove.
No play possible at Worcester and Cardiff on second day because of rain
Sussex 292-6 v Yorks
Shot! McAndrew plays a pleasing back foot drive through the off side for four.
Fisher is driven again, this time on the front foot through extra cover.
Too much width from the bowler.
Confident start from the Aussie number eight.
Sussex 284-6 v Yorks
McAndrew drives and edges his first ball through the vacant fourth slip region for four.
Now we have a fourth slipper - as Dom Bess moves in from point.
He picks up a single off the fourth ball and Carter leaves outside off stump.
Remember that glimmer of Hove sunshine? It's gone now, sorry.
Somerset 380-8 v Lancs
Jimmy Anderson takes a breather with figures of 5-76 against his name.
Saqib Mahmood takes over with England spinner Jack Leach on strike at the other end and finds the boundary following five dot balls.
Sussex 275-6 v Yorks
Carter plays and misses a few outside the off stump but survives the Fisher over.
The fifth ball squares him up and Carter nicks it between keeper and first slip for four.
Ben Coad takes the new ball from the Cromwell Road End...
First ball! Hudson-Prentice drives and edges to second slip.
Nathan McAndrew to bat next.
Northants v Hants 310-5
Thankfully it wasn't a long interruption at Wantage Road.
Jack White resumes and James Vince collects one to advance to 117 not out. That's the only addition from the over.
Sussex 275-5 v Yorks
Just a glimmer of sunshine at Hove.
Shakeel struggles a bit with his length at first but delivers a maiden over.
Umpire Rob White has the new ball - and Matt Fisher will take it.
We have extended sessions of play here today. Lunch will be taken at 1:10pm.
Tea at 4pm.
Abell lbw b Balderson 151 (Somerset 370-8 v Lancashire)
The answer, sadly, is a big fat zero!
Tom Abell departs for 151, but what an innings he has produced for his team.
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A career-best score for Tom Abell. How do you see his career progressing, Somerset fans? Is he destined to play Test cricket or could he miss out like former team-mate James Hildreth? Let us know your views.
Somerset 365-7 v Lancashire
Abell takes a single off Jimmy Anderson and there it is, his best-ever score.
151 not out - how many more will he get?
Sussex 275-5 v Yorks
After a cold drizzly morning, we're ready to go again.
The gulls are in full voice and the skies are a little brighter than they were.
Oli Carter and Fynn Hudson Prentice are back in the middle on 60 and 32 respectively.
Left armer Saud Shakeel will bowl for the first time in a Yorkshire shirt.
The new ball is due after this over.
Somerset 364-7 v Lancashire
The Somerset skipper equals his career-best with a lovely clip through the onside for four.
Abell has batted for 279 balls, hitting 19 fours and a six.
He only needs one more for a new best.
Sussex 275-5 v Yorks
Bad news, I'm afraid. Further rain delays reported here.
No updates on pitch inspections and revised playing times just yet.
Glamorgan v Durham 382-6
The umpires have decided to order an early 12:30 lunch at Sophia Gardens. They will then inspect at 13:10, with a view to re-starting play as soon as possible during the afternoon.
Brydon Carse is 51 not out for Durham, with Liam Trevaskis on 43. Their stand is so far worth 81.
Sussex 275-5 v Yorks
We had hoped to resume here by now but the ground staff need to do a bit more work on the square.
The good news is that the covers are off, the roller is out and the Yorkshire players have started some fielding drills.
Fingers and toes are very much crossed.
Somerset 356-7 v Lancashire
Image source, Rex FeaturesJimmy Anderson underlines what a fantastic cricketer he still is.
He gets Kasey Aldridge caught in two minds and the sharp low chance at first slip is well caught by Luke Wells.
Three wickets this morning and a 54th five-wicket haul of his first-class career.
His figures for the match now read 26.1-4-70-5.
Somerset 356-6 v Lancashire
The end of the 110th over and the cut-off point for bonus points.
Somerset take with the bat and Lancashire two with the ball.
Scoring 450 in 110 overs to take the maximum five batting points feels like a tough order, especially if the bowlers have any kind of tight spell.
Northants v Hants 309-5
What a good signing Ben Brown was for Hampshire - a wicketkeeper with a batting average of over 40. An ideal partner for James Vince as he looks to push on.
The lights are on at Wantage Road, though, and after BBC Radio Northampton's Andrew Radd reports drizzle in the air, the umpires lead the players off the field.
Somerset 350-6 v Lancashire
Tom Abell runs a single out to the cover fence and that brings up his side's 350.
A third batting point of the innings for Somerset.
Somerset 347-6 v Lancashire
Two fours in the over for Tom Abell off Jimmy Anderson.
The first one goes down to the vacant area at third but there is no mistaking the quality of the second as he sends a half-volley to the cover boundary.
Abell is now up to 141. He needs 10 more for a career-best first-class score.
Sussex 275-5 v Yorks
Weather permitting. Always say that.
A closely fought game on day one.
Yorkshire are one over away from claiming the new ball.