Nottinghamshire wrapped up a straightforward win over Somerset to keep pace with Yorkshire at the LV= County Championship Division One summit.
Somerset had staved off an innings defeat, largely thanks to Peter Trego's century, but Notts returned on the final morning needing only 44 runs to complete a chase of 110.
Nightwatchman Ajmal Shahzad was almost run out in the first over but that was the only alarm as he and Phil Jacques knocked off the runs required for a seven-wicket win.
Lancashire also made short work of Northamptonshire to win by an innings and 200 runs.
Northants had followed on 470 runs in arrears of the Red Rose's mammoth 650 for six declared, and though they fared better in their second innings they began Wednesday's play on 231 for eight.
Simon Kerrigan took the two wickets required, finishing with four for 76, though Andrew Hall finished 50 not out and last man Azharullah hit 24 from 20 balls.
Just 2.5 overs were required for Durham to round off a 309-run win over Sussex, though James Tredwell completed his half-century before Chris Rushworth removed last man Lewis Hatchett to bowl the visitors out for 182.
Surrey beat Leicestershire by 10 wickets in the only Division Two match to continue on to Wednesday.
Leicestershire reached 319 as a last-wicket stand of 94 between Jigar Naik (37no) and Charlie Shreck, who hit his maiden first-class half-century at the age of 36, staved off an innings defeat and left Surrey chasing 69.
They got there without losing a wicket, with Rory Burns making 40no from 41 balls and Zafar Ansari on 25.