Northants on the ropes
Yorkshire took complete control of their LV= County Championship Division One clash against Northamptonshire on a record-breaking third day at Wantage Road.
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Adam Lyth and Alex Lees put on 375 for the opening wicket with the former registering a brilliant 230 in 546 for three declared before the visitors reduced the hosts to 66 for three at the close.
That left Northamptonshire 365 runs behind with seven wickets left as they looked to avoid slipping to a fifth defeat of the season.
Scott Borthwick's maiden double century left Durham in charge of their clash with Division One leaders Middlesex.
Borthwick's career-best 216 had helped the reigning champions to a total of 568 for nine declared, and they took full advantage as they reduced the visitors to 69 for four before rain intervened on day two at Chester-le-Street.
Samit Patel posted a superb 156 as visitors Nottinghamshire asserted control on the second day of their clash with Sussex at Hove.
Patel had hit an unbeaten 142 on Sunday's opening day and although he could only add 14 to his overnight total before he was caught by Ed Joyce off Matthew Hobden, it was enough to secure his side a commanding total.
If anything, the visitors may have hoped for more having ended day one on 408 for five and adding 44 for the last five wickets before they were finally bowled out for 452.
Sussex had laboured to 270 for eight at close, still a full 182 runs behind the visitors.
Lancashire's difficult return to the top flight continued as they were left chasing the game against Somerset after two days at Old Trafford.
Having allowed their visitors to pile up 312 for three on day one, the Red Rose bowling attack produced a creditable effort to bowl them out for 420 despite Alviro Petersen's 155 - but they were again let down by their batsmen.
Paul Horton and Andrea Agathangelou fell cheaply as Lancashire slipped to 22 for two, still 398 behind, before rain washed out much of the last two sessions.
Will Gidman took five wickets as Gloucestershire bowled out Leicestershire for 269 on day one of their Division Two clash.
The seamer took his Championship record this season to 30 wickets at an average of 12.93 with figures of five for 46 as his side made a good start in search of their second win of the campaign.
Niall O'Brien top-scored for the hosts with 88 but Gloucestershire will be happy with their effort and will continue their response on the second morning with all 10 wickets intact and a dozen runs on the board.
A London traffic jam meant England paceman Jade Dernbach missed Surrey's morning session in the field - and that set the tone for something of a slow day all round at the Kia Oval.
Dernbach made up for lost time with two wickets immediately after lunch but by then Worcestershire - who also had issues getting to the ground after the closure of Vauxhall Bridge - had already added another 90 runs to their opening-day 329 for four, although they did lose three wickets in the process.
The visitors were eventually dismissed for 476 but Surrey's 134 for two at stumps would have looked much better had Rory Burns, who had played sensibly all afternoon for a hard-earned 79, not been dismissed off what turned out to be the last delivery of the day.
Essex wicketkeeper James Foster hit a fine 86 to steer to his side to a first-innings lead of 36 over Glamorgan on day two of their match at Chelmsford.
The hosts looked set to face a deficit as they stumbled to 198 for eight before Foster's heroics forged a ninth-wicket stand of 63 and ultimately helped establish an encouraging total of 280.
Hampshire's slow left-armer Danny Briggs claimed four wickets to leave Division Two's bottom side Derbyshire in trouble at the Ageas Bowl.
They finished the second day on 166 for seven, still 222 runs behind, and with no recognised batsmen left face an uphill struggle.