Tom Lammonby struck a career-best List A score of 114 for Somerset during their handsome victory over Surrey
Somerset kept their hopes of qualifying for the latter stages of the One-Day Cup alive with a thumping victory over Surrey, thanks to a brilliant Tom Lammonby ton.
The opener hit 114 in a huge partnership with captain Lewis Goldsworthy as Somerset thrashed their Group A rivals.
Elsewhere, Leicestershire pipped Warwickshire to stay top of the group, while Luc Benkenstein's electric innings of 140 helped Essex edge past Glamorgan in a Cardiff nail-biter.
Middlesex remain top of Group B after a tight victory over Durham who lost England international Emilio Gay to injury early in his innings.
And holders Worcestershire Rapids chased down 334 at lowly Sussex in the penultimate over, directed beautifully by captain Jake Libby with an unbeaten century.
Freddie McCann hit 91 as Notts beat Northamptonshire by six wickets
At Chesterfield, Northamptonshire reached 259-8 from their 50 overs thanks to contributions from opener Luke Proctor (53), captain Nathan McSweeney (49) and George Bartlett (55).
It became increasingly apparent, though, that the visitors were short as Nottinghamshire's chase wore on, despite losing opener Ben Martindale for 18 and Tayyab Tahir for eight.
At 64-2, Freddie McCann then hit 91 before being trapped by Yuzvendra Chahal while captain Haseeb Hameed added a knock of 51 to place the hosts in a position of strength.
Kyle Verreynne (39 not out) and Lyndon James (45 not out) then put on an unbroken partnership of 69 to steer Notts to a comfortable six-wicket victory with more than three overs to spare.
Having lost Johnny Connell cheaply, Somerset pair Lammonby (114) and Goldsworthy (83) blitzed 152 from 141 deliveries for the second wicket to set up the hosts' big 188-run victory over Surrey at Taunton.
Middle order pair Archie Vaughan (52) and Kian Roberts (32) built on that early partnership as Somerset posted a mammoth 368-9.
Surrey's pursuit got off to the worst possible start when they lost Dominic Sibley for a two-ball duck and fellow top-order batters Ryan Patel (40), Rory Burns (15) and Adam Thomas (9) soon followed to leave the visitors flailing at 65-4.
Ollie Sykes (34) and Josh Blake (47) shared a 57-run partnership to drag Surrey back into the equation, but the visitors were bowled out for 180.