Surrey's batting capitulated for the second time as Middlesex sealed an innings win before tea on day three.
Steve Finn claimed 4-19 as Middlesex crushed Derbyshire by an innings and 35 runs with a day to spare at Lord's.
Kent completed a 10-wicket victory over Middlesex to open a 36-point lead at the top of Division Two.
Neil Dexter is set to leave Kent after turning down a new deal at the club because he wants to play more first-team cricket.
Essex have taken Neil Dexter on a month's loan from Kent.
Andrew Strauss says the 50-over format has showcased the best of young English talent.
Full-on Yorkshire are the pride of the County Championship, says David Lloyd, and deservedly so.
County Champ D1
County Champ D2
T20 Champions Lge