D1: Kent v Essex, Middlesex v Notts, Northants v Hants, Somerset v Lancs
England opener Ben Duckett scores hundred for Notts at Lord's
Nick Gubbins and James Vince score centuries for Hampshire against Northants
Tom Abell and James Rew make unbeaten tons for Somerset against Lancashire
Only 42 overs possible between Kent and Essex because of rain
D2: Glamorgan v Durham, Sussex v Yorks, Worcs v Gloucs
Gloucestershire's Tom Price hits 93-ball hundred and takes a hat-trick at New Road
Durham reach 382-6 on the opening day against Glamorgan in Cardiff
Sussex's Tom Alsop is out five runs short of a hundred against Yorkshire
Worcs v Glos 103-8
Tom Price picks up a couple of fours off Ben Gibbon with a flashing drive through the off side and a swat to square leg.
He thumps a six over wide mid on to take the visitors to 100.
Kent v Essex 143-1
An easy single from Tom Westley and that is the century partnership between him and Nick Browne.
Essex in a very strong position at the moment.
Worcs v Glos 89-8
Joe Leach takes his fourth and it's a brilliant diving catch from Pears keeper Ben Cox as Zafar Gohar prods loosely outside the off stump.
Somerset 101-4 v Lancashire
A lovely clip to the midwicket boundary from skipper Tom Abell off Tom Bailey brings up the Somerset 100.
Lots of batting still to do from here with four wickets down, though.
Northants v Hants 88-2
Nick Gubbins flicks away Jack White off his hip. Ben Sanderson makes a diving save at backward square leg but only succeeds in pushing the ball into the rope a few yards further on.
The pace bowler responds with a superb delivery which cuts away off the pitch and just beats the outside edge.
Gubbins has 41 not out and James Vince is on five.
BBC Radio Northampton's Andrew Radd tells us: "Hampshire are chasing their first Championship victory at Northampton since 1993 - when BBC Radio Solent commentator Kevan James was a key player, removing the likes of Allan Lamb and Rob Bailey before helping Hampshire to their victory target with a knock of 71."
Middlesex v Notts 125-1
A blustery afternoon at Lord's.
Another tight line and length from the Middlesex captain - plus a hint of swing as Ben Slater is hit on the pad.
A half appeal but its not out. Looked a bit leg side.
Duckett tucks Bamber away to square leg for one. Slater leaves carefully outside off stump.
Steady start to the session of play.
Sussex 113-2 v Yorks
A productive first over after lunch for Sussex.
Cheteshwar Pujara finds the boundary from Matt Fisher's opening delivery and there is another later in the over which costs the paceman 10 runs.
Somerset 92-4 v Lancashire
Jimmy Anderson is opening the bowling immediately after lunch for Lancashire.
Remember, his spell this morning was 7-2-13-2 as Somerset slipped to 24-3.
Somerset 91-4 v Lancashire
Anthony Gibson
BBC Radio Somerset commentator
Somerset's top order batting still isn't firing. Put in by Keaton Jennings, they lost three wickets in the first three quarters of an hour to JImmy Anderson and co, and a spirited counter-attack was cut short when Tom Kohler-Cadmore played one aggressive shot too many to be caught on the long leg boundary by Tom Bailey off Colin de Grandhomme's medium pace.
Tom Abell is still there, but the injury-dictated absence of Craig Overton and Josh Davey means a longer tail than usual as well as a seriously weakened bowling attack.
The sun may be shining but Somerset's prospects in this game are already looking distinctly gloomy.
Northants v Hants 81-2
They are under way again at Wantage Road and James Vince finds the square leg boundary from a Jack White delivery that is fractionally short of a length.
There's a loud lbw appeal but Vince is given the benefit of the doubt. Must have been a close call.
Middlesex v Notts 123-1
A very encouraging start for Notts - who put on an opening stand of 117 in 28 overs before the wicket of Haseeb Hameed just before lunch.
His half century brought the visitors to a very welcome batting milestone, as reported by Dave Bracegirdle this afternoon. The 7000th half century scored for Notts no less.
Bens Slater (4 not out) and Duckett (58 not out) to resume the batting - and another Ben to resume the commentary here.
Duckett to face Roland-Jones...
Kent v Essex 125-1
Image source, Rex FeaturesTom Westley only needs two balls after lunch to bring up his half-century.
Conor McKerr is short and wide and that gets the treatment it deserves.
A ninth four in a pleasing innings for the Essex skipper off 60 balls.
Worcs v Glos 73-7
A great day for Joe Leach so far. He resumes with figures of 8-2-13-3 for the Pears.
Zafar Gohar (16 not out) and Tom Price (11 not out) have a mountain to climb.
Very much a Yorkshire theme during the lunch break - you can listen to an excellent interview with coach Ottis Gibson below. He thinks the late Malcolm Marshall is the best fast bowler ever.
Wonder if Bazball would have worked against Malcolm? No-one would have dared to try it against that West Indies attack.
Yorkshire head coach Ottis Gibson chats about the players who inspired his career
Form one Yorkshireman to another.....Jonny Bairstow talks about returning to action for his home county next month and the forthcoming Ashes series while, at the same time, auditioning for the role of 007.
'It’s imminent we’re not far away.' - Bairstow on returning back to England test team.
Jonny Bairstow is expected to play two Championship matches for Yorkshire in May as he bids to be fit for England's one-off Test against Ireland and the Ashes series against Australia.
Read MoreWe mentioned earlier on that Dickie Bird celebrated his 90th birthday yesterday. Here are a few words from the man himself.
Dickie Bird shares his secrets to a healthy life as he turns 90
Retired cricket umpire and Yorkshire icon Dickie Bird on turning 90 - and what's next.
Read MoreKent v Essex 121-1 - lunch
Matt Cole
BBC Radio Kent commentator
Image source, Rex FeaturesEssex have dominated with the bat after winning the toss at the Spitfire Ground.
Seemingly picking off boundaries at will on a pitch giving little assistance to the seamers, they raced to 43-0 in the 9th over before losing their first – and so far only – wicket of the day, Sir Alastair Cook going caught behind off Australian Wes Agar for an uncharacteristically rapid 39 off 30 balls.
At a sunny but brisk Canterbury, coat and scarf muffled spectators have been treated to an assured display from Essex skipper Tom Westley (49*) and Nick Browne (34*) who’ve been relatively untroubled by Kent’s attack so far.
The home side have struggled to make things happen on what looks like a benign surface, and may be in for a long day in the field.
Sussex 103-2 v Yorkshire - lunch
Adrian Harms
BBC Sussex commentator
Honours about even at Hove after Sussex won the toss on a good batting wicket at Hove.
Ali Orr and Tom Haines got Sussex off to a flying start before Orr played a loose shot to be caught in the slips for 20, and then Tom Haines looked either disgusted with himself, or more likely the decision, as was given out two short of a half century.
Mickey Edwards, the Australian making his Yorkshire debut, has looked impressive, bowling with good pace, and might on other occasion have picked up a couple of wickets.
Gloucestershire 73-7 v Worcestershire
Ged Scott
BBC Sport at New Road
Image source, Ged Scott - BBC SportWhat a first morning of the season at New Road.
Seven wickets gone - four of them inside the first half hour.
Bad shots? Possibly. But really more to do with fine bowling, from a Worcestershire pace attack spearheaded by the ageless Joe Leach, who led the way with an opening spell of 13-2-8-3.
Jack Taylor and Zafar Gohar have dug in a bit for Gloucestershire with a 28-run stand to shore things up - but it's still been the hosts' morning - and in glorious Pear weather too.
Division One
Kent v Essex 121-1
Middlesex v Nottinghamshire 123-1
Northamptonshire v Hampshire 77-2
Somerset 91-4 v Lancashire
Division Two
Glamorgan v Durham 104-1
Sussex 103-2 v Yorkshire
Worcestershire v Gloucestershire 73-7