Well, that's been quite some day.

With so many comings and goings between Essex and Yorkshire at Chelmsford - where 22 wickets fell in the day - it was easy to overlook that there were seven other games going on.

MarcusTrescothick and Somerset team-mate George Bartlett, and Surrey's Rory Burns made centuries in Division One - although Trescothick suffered a broken metatarsal late in his innings against Lancashire.

Sam Cook took five wickets as Yorkshire were all out for just 50 in their first innings before fighting back, but although Darren Stevens and Timm van der Gugten claimed six victims each in Cardiff. Sussex's Ollie Robinson had the day's best return of 7-58 against Middlesex.

Thanks for your company throughout the day. We'll be back with you from 10:30 BST tomorrow morning with another exhilarating day in prospect.

Division One

Yorkshire 50 & 161-2 v Essex 142

Somerset 321-5 v Lancashire

Nottinghamshire 302 v Hampshire 70-3

Surrey 278-4 v Worcestershire

Division Two

Leicestershire 301-4 v Durham

Glamorgan 94 v Kent 163-9

Middlesex 230 v Sussex 60-4

Derbyshire 318 v Warwickshire 375-6 (day two)

Image source, Getty Images

Samit Patel's attacking 73 off 92 balls and Riki Wessels' 54 were the backbone of Nottinghamshire's innings as the hosts recovered from 23-3 to post a total of 302.

Patel and Ross Taylor (47) shared a crucial 95-run fourth-wicket partnership before the latter was run out on a tricky pitch at Trent Bridge.

Hampshire regularly took wickets to put a dent in Notts' attempt to find consistency in their batting with Fidel Edwards finishing with figures of 4-84.

England bowler Stuart Broad, having scored a quickfire 33, impressed with the ball picking up two early wickets as the visitors closed on 70-3, still trailing by 232 runs.

Nineteen wickets tumbled in Cardiff on day one of the match between Kent and Glamorgan as Darren Stevens and Timm van der Gugten took six each.

After a wicketless opening session, Stevens triggered an almighty collapse after the lunch break as Glamorgan went from 57-0 to 94 all out, with the veteran Kent bowler finishing with figures of 6-26 and Matt Henry 4-31.

The visitors struggled in reply, with Van der Gugten's own six-wicket haul reducing Kent to 163-9 at the end of the day, giving them a slender lead of 69 with one wicket of their first innings left.

Glenn Speller
BBC Essex sport

Image source, Rex Features

An amazing day of cricket which started with Yorkshire winning the toss and batting in what seemed friendly conditions. It quickly became apparent that wasn’t the case as the visitors were reduced to 9-3, 22-5 and 50 all out.

Sam Cook, Peter Siddle and Jamie Porter put the ball in the right place and the Yorkshire batsmen obliged with Cook taking the prize wicket of Joe Root, first ball, as part of his 5-28.

Essex found batting almost as difficult but a 92-run lead looked more than handy, given what had gone before, but credit must go to Yorkshire for fighting back.

Pushing Johnny Bairstow up the order to open was a positive move and his 50, along with Harry Brook’s unbeaten 57 - the highest score of the day - has possibly made it their day.

There aren’t many times you are bowled out for 50 but still come out on top!

FOR HARRY BROOKpublished at 18:43 British Summer Time 4 May 2018

18:43 BST 4 May 2018

Yorkshire 50 & 152-2 (29 overs) v Essex 142

Harry Brook collects two runs off Jamie Porter to reach a well-played half-century from just 46 balls. It's his first in Championship cricket, and he's shown a cool head in difficult circumstances. The White Rose county lead by 60 with eight wickets standing.

Image source, Getty

It was a good day for bowlers at Hove, with Ollie Robinson claiming 7-58 for Sussex and Middlesex were bowled out for 230.

England's Dawid Malan, the Middlesex skipper, was among his victims, lbw for 13, but a mature unbeaten 84 by Max Holden enabled the visitors to at least collect one batting point.

Sussex found batting no easier in reply as Tim Murtagh and James Harris picked up two wickets each, the latter bowling Luke Wright for nine late on, prompting Sussex to send in Danny Briggs as nightwatchman.

Martin Emmerson
BBC Newcastle

It's been Leicestershire's day on day one of their County Championship match against Durham in Chester-le-Street.

Durham skipper Paul Collingwood put them in in the belief the wicket would do a bit - but it didn't and it turned into a long day for his bowlers.

It wasn't until the half-way point that the first wicket fell when Paul Horton departed for 75, cutting a slow bouncer from Nathan Rimmington to Cameron Steel at point.

By then he'd put on 146 with Michael Carberry, who would eventually fall for 73. It's the Foxes' highest first- wicket stand in the championship against Durham. The previous best was 101, set in 2004.

Mark Cosgrove also helped himself to a half century, finishing the day on 66 not out in glorious sunshine.

We mentioned earlier on how Marcus Trescothick suffered an injury in the latter stages of his century against Lancashire at Old Trafford. A fracture has been confirmed at a local hospital - but there is no prognosis yet as to how long the former England opener will be out of action.

Warwickshire enjoyed a productive day at Edgbaston adding 353 runs to their overnight 32-1 for the loss of five wickets. Nightwatchman Chris Wright survived beyond lunch for 72 after Will Rhodes (50) went during the morning session.

Ian Bell missed out on a big score when he fell for 44, but Jonathan Trott (76) added 157 with Matt Lamb before he became leg-spinner Matt Critchley's third victim.

Lamb reached the close on 79 not out, with his side 57 ahead, but they will need to score 25 from the first two overs on day three to secure a fifth batting point.

Seven overs remain at Chelmsford, and Harry Brook and Cheteshwar Pujara are fighting to see out the day for Yorkshire, who are 30 runs ahead. Having made a three-ball duck earlier in the day, Brook has a six and four fours in his 33, with India Test batsman Pujara 11 not out at the other end. Jamie Porter and Simon Harmer, Essex's leading wicket-takers in last summer's title triumph, are bowling in tandem.

There's a 22-year age gap between them but Marcus Trescothick and George Bartlett had a day to remember as Somerset seized the initiative against Lancashire.

Trescothick made exactly 100 and Bartlett 110 - his maiden first-class century - but the former ended the day in a local x-ray department after injuring an ankle near the end of his innings.

Somerset lost Steven Davies, caught behind down the leg-side off Jordan Clark from the day's final delivery, but Tom Abell will resume his innings on Saturday with 48 to his name.

Jimmy Anderson, playing his first Championship game of the summer, bowled 19 wicketless overs at a cost of 70 overs and for once, it was his hairstyle - now bleached - that attracted attention.

Extra seats needed for a trending topic - BBC Sport looks at the reaction to India captain Virat Kohli joining Surrey in June.

Surrey opener Rory Burns batted through the day to finish unbeaten on 137 as he dominated much of the play on day one against Worcestershire.

England opener Mark Stoneman was earlier unable to get runs under his belt as he was run out attempting a quick single.

Pears captain Joe Leach then dismissed Scott Borthwick and Ravi Patel in identical fashion, as they feathered behind, after lunch to help the visitors fight back.

But Burns remained in control, and despite taking his time, he complied his first century of the season to put his side in a commanding position at stumps.

Image source, Getty Images

FOR JONNY BAIRSTOWpublished at 17:43 British Summer Time 4 May 2018

17:43 BST 4 May 2018

Yorkshire 50 & 77-0 (14.2 overs) v Essex 142

Image source, Rex Features

What a topsy turvy day at Chelmsford. Jonny Bairstow, pressed into service by a second-innings opener by Yorkshire, races to a 42-ball fifty by jabbing the ball to the third-man boundary off Peter Siddle. Suddenly, the visitors are only 15 behind and right in what has effectively become a one-innings contest against the defending champions.