All the results and a complete review of the latest round of action in the Specsavers County Championship.
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Hampshire v Lancashire, Ageas Bowl
Result: Lancashire (149 & 314-5) draw with Hampshire (224)
Middlesex v Warwickshire, Lord's
Result: Warwickshire (126 & 361) beat Middlesex (161 & 136) by 190 runs
Yorkshire v Essex, Scarborough
Result: Essex (231 & 34-2) beat Yorkshire (113 & 150) by eight wickets
Somerset v Surrey, Taunton
Result: Somerset (436) draw with Surrey (345)
Derbyshire v Nottinghamshire, Derby
Result: Nottinghamshire (508-9d) beat Derbyshire (220 & 227) by an innings and 61 runs
Leicestershire v Durham, Grace Road
Result: Leicestershire (124-4) draw with Durham (525-8d)
Northamptonshire v Gloucestershire, Northampton
Result: Northamptonshire (343 & 50-5) draw with Gloucestershire (265)
Worcestershire v Sussex, New Road
Result: Sussex (430 & 11-1) beat Worcestershire (268 & 170) by nine wickets
England new boy Mark Stoneman and Dom Bess shone as Somerset and Surrey battled out an inevitable draw on the final day of their Specsavers County Championship clash at Taunton.
Stoneman celebrated his England call-up for next week's first Test against West Indies with a top score of 67 while Somerset youngster Bess claimed five for 101 - taking his tally to 35 wickets in just six championship appearances - in a Surrey first-innings total of 345.
That was in reply to Somerset's 436 in a rain-affected match, which included a third-day washout and both sides only managing one innings each. The hosts took 13 points in their fight to avoid relegation, while Surrey collected 11.
This was the remaining match of the latest round to conclude.
Nottinghamshire moved closer to a return to the Specsavers County Championship Division One after crushing Derbyshire by an innings and 61 runs at Derby.
Chris Read set a new wicket-keeping record for Notts with his 368th dismissal as they bowled the hosts out for 227 to move 35 points clear at the top of Division Two.
The visitors' success was all the more impressive given the heavy rain which washed out the morning session and ruled out any play until 1pm.
Needing to bat through 75 overs to avoid defeat, Derbyshire started well with Billy Godleman (47) and Ben Slater (44) providing some resistance.
But Read's heroics and a fine haul of five for 74 from Brett Hutton gave Nottinghamshire victory in the only one of five Championship games that saw any action.
Also in Division Two, Northamptonshire's match against Gloucestershire was abandoned as a draw, as was Leicestershire against Durham at Grace Road.
No play was possible in Division One, with Lancashire's match against Hampshire at the Rose Bowl petering out into a draw.
Somerset and Surrey were also shut out by the weather, with a draw looking the most likely outcome going into the final day on Thursday.
Lancashire's hopes of keeping the pressure on Division One leaders Essex were thwarted by rain which wiped out most of Tuesday's scheduled action in the Specsavers County Championship.
Essex had made full use of the dry weather earlier in the week as they saw off Yorkshire inside two days at Scarborough and now hold a 49-point advantage at the top with five Championship games to go.
However, at the Ageas Bowl, Lancashire's drive to secure a positive result against Hampshire was hampered as rain prevented any action on day three, with another poor forecast set for Wednesday.
Opening batsman Haseeb Hameed had been looking to build on his 77 not out to push himself back into England contention after recovering from a broken hand.
Play was eventually called off at 3:30pm following a number of inspections.
Warwickshire, though, were able to beat the weather and dismiss Middlesex for 136 at Lord's to claim their first Championship win of the season by a 190-run margin.
Chris Woakes, back from a two-month injury lay-off, took three for 38 as he and Keith Barker, who snapped up the first three wickets for 21, left the Middlesex second innings in ruins.
Warwickshire, resuming on 293 for eight, had reached 361 in their own second innings to set Middlesex 327 for victory.
There was also some action possible at Taunton, where a maiden Somerset century from Steven Davies against his former county Surrey put the hosts in a good position. Some 33.1 overs were, though, lost because of the weather.
Overnight batsmen Davies and Tom Abell extended their scores to 142 and 96 respectively as the hosts - who resumed at 234 for four - pushed their first innings total on to 436, with Dom Bess contributing a career-best 55.
By the close, Surrey had replied with 69 for one, still trailing by 367, with Mark Stoneman unbeaten on 34, which left him at 1,000 first-class runs for the season.
Division Two leaders Nottinghamshire were frustrated by rain which prevented any play against Derbyshire.
The visitors will be hoping for clear skies on the final day as they target the remaining nine Derbyshire second-innings wickets to secure a win which would take them a step closer to an immediate return to Division One.
Alex Hales' superb 218 on Monday had set up the prospect of an innings victory, with Derbyshire at 45 for one, still 243 runs behind.
Sussex, meanwhile, are now in the thick of the promotion chase after completing a season's double over Worcestershire on the third day at New Road.
Having made the home side follow-on 162 behind, they bowled them out again for 170 with David Wiese taking the first three wickets and Jofra Archer blitzing the lower order with three dismissals in five balls.
Sussex lost Luke Wells in clearing off nine runs for a nine-wicket victory - their fourth in five games.
A saturated outfield following downpours at Grace Road meant play had to be abandoned without a ball being bowled on the third day between strugglers Leicestershire and Durham.
Heavy rain also prevented any play on day three at Wantage Road between Northamptonshire and Gloucestershire.
Alex Hales delivered a timely reminder to the England selectors with a brilliant double century that put leaders Nottinghamshire in total control of their Specsavers County Championship Division Two match against Derbyshire.
Batting at number five, a problem position for England, Hales plundered 38 fours and a six in a run-a-ball 218 which included a century between lunch and tea to continue his stunning form.
He shared a sixth-wicket stand of 204 in 35 overs with skipper Chris Read, who scored 75 in Nottinghamshire's 508 for nine declared, which included 50 extras.
Derbyshire's second innings started badly, losing Luis Reece to their former fast bowler Mark Footitt in the fourth over, and at the close the hosts were 45 for one, still 243 behind.
Out-of-form opener Haseeb Hameed posted his highest score of the season in Lancashire's Division One top-of-the-table contest with Hampshire.
Hameed has endured a difficult year after making his England breakthrough in India before Christmas but he dug in at the Ageas Bowl to close day two on 77 from 219 deliveries.
By contrast, opening partner Alex Davies smashed 97 off only 92 balls to help establish a 239-run lead for Lancashire after they had been bowled out for 149 on day one.
Hampshire were dismissed for 224 before second-placed Lancashire - just a point above their hosts - reached stumps on 314 for five.
England all-rounder Chris Woakes marked his return to action with a half-century to put relegation-threatened Warwickshire in a commanding position against Middlesex.
After 20 wickets fell on the opening day at Lord's, the visitors produced a gritty performance to end day two on 293 for eight, a lead of 258. Matt Lamb made a determined 71 in only his third first-class match while former England number three Jonathan Trott also contributed a fifty.
Mohammad Amir's 10-wicket haul led Essex to a two-day win over Yorkshire at Scarborough to leave them in sight of a first Championship title in 25 years.
Essex completed their 19-point success - a sixth win in nine matches this season - shortly after tea by chasing a target of just 33 for the loss of two wickets.
The visitors are now 49 points clear with five matches remaining, although other results are still to come.
Yorkshire were dismissed for only 113 and 150 on their way to a third defeat in four games that leaves them looking over their shoulder.
On day one of this week's other Division One contest, Tom Abell led from the front with an unbeaten 88 as Somerset reached 234 for four before rain washed out the final session against Surrey at Taunton.
Elsewhere in Division Two, Durham's bowlers drove home the advantage after the visitors had made their highest score against Leicestershire since becoming a first-class county.
Teenage seamer Matthew Potts picked up two wickets as the Foxes finished day two at Grace Road on 124 for four in reply to Durham's imposing 525 for eight declared.
Opener Cameron Steel laid the platform with 224 off 408 balls.
Second-placed Worcestershire are up against it at home to Sussex after slumping to 231 for eight in response to 430.
Jofra Archer's 59 pushed Sussex past 400 before he and new-ball partner Chris Jordan (three for 61) shared five wickets.
Joe Clarke scored a classy 77 off 79 balls but received little support from his Worcestershire team-mates.
Liam Norwell and David Payne produced an inspired new-ball spell as Gloucestershire roared back into contention against Northamptonshire at Wantage Road.
The hosts closed the second day on 50 for five in their second innings, leading by only 128.
Leaders Essex claimed the advantage on an eventful first day in their Specsavers County Championship Division One clash with Yorkshire.
Mohammad Amir's five for 18 - his first such Essex haul - saw Yorkshire dismissed for 113 in just 35.2 overs, with only Adam Lyth (68) offering any resistance at Scarborough.
Essex also lost wickets at regular intervals as Ben Coad (three for 29) and Jack Brooks (three for 72) made inroads. But Essex reached 188 for eight, a lead of 75, as Ryan ten Doeschate played a captain's innings with an unbeaten 61 from 119 balls.
Wickets also tumbled in the battle between second and third at the Ageas Bowl.
Second-placed Lancashire were all out for 149 as Haseeb Hameed failed his England audition by making just six from 39 balls.
Only Alex Davies (36) fended off the home bowlers for any length of time as leg-spinner Mason Crane (three for 27) returned the best Hampshire figures.
James Vince, another hoping to push his England claims, top scored with 40 in reply as Hampshire reached 147 for five to trail by two at the close.
Middlesex and Warwickshire contested a remarkable opening day as 20 wickets fell at Lord's.
Steven Finn (four for 53), Tim Murtagh (three for 20) and Tom Helm (two for 42) saw Warwickshire dismissed for 126 in 47 overs.
But Middlesex found batting just as difficult when it was their turn, and they only owed their 35-run advantage on first innings to a seventh-wicket stand of 93 between skipper James Franklin (55) and Ryan Higgins (38).
Australian Ryan Sidebottom took four for 29 on debut as Middlesex ended on 161. Warwickshire, with England seamer Chris Woakes back in their side after two months out through injury, had reached 12 without loss at the close to cut the deficit to 23.
In Division Two, Brett Hutton's five-wicket haul put Nottinghamshire in control at Derby.
Hutton fully vindicated Chris Read's decision to bowl first by returning his best figures of the season - five for 52 - as Derbyshire were dismissed for 220.
Mark Footitt, who enjoyed his best years with Derbyshire before he moved to Surrey at the end of the 2015 season, also claimed two for 49.
Alex Hughes top scored with an unbeaten 55 before Nottinghamshire reached 93 for two when bad light ended play early.
Second-placed Worcestershire made early breakthroughs to reduce Sussex to 49 for three at New Road.
But Chris Nash - who had previously mustered only 205 Championship runs during 2017 at an average of 17.08 - rediscovered his form with a first hundred of the season as Sussex closed on 342 for seven.
Nash shared in partnerships of 97 with Luke Wells (85) and 118 with Chris Jordan (57 not out) to dent Worcestershire's charge.
Cameron Steel and Tom Latham scored centuries as Durham put a severely-depleted Leicestershire attack to the sword.
New Zealand international Latham (124) became the sixth Durham batsman to score a century on debut against another county and Steel ended the day unbeaten on 145 - his highest in first-class cricket.
The pair put on 234 for the first wicket and Durham closed on 324 for four, with Dieter Klein picking up a couple of wickets.
Northamptonshire were bowled out for 343 on the opening day against Gloucestershire.
Rob Newton (70), Richard Levi (56) and Ben Duckett (52) all made fifties with Liam Norwell (three for 70) the pick of the visitors' bowlers.