Lancashire 188 for 5 beat Northamptonshire 124 for 7 by 64 runs
Lancashire heaped more misery on bottom club Northamptonshire with a 64-run victory in their final North Group fixture at Old Trafford.
The home side signed off from the group stages with their sixth successive victory in the competition and they will now prepare for a quarter-final showdown with Sussex.
Batsmen Karl Brown and Steven Croft both struck half-centuries for Lightning, who raced to 188 for 5 in their 20-over allocation. The Steelbacks never threatened the total and crawled to just 124 for 7 in reply.
Lancashire openers Stephen Moore and Brown laid the perfect platform on which to build a sizable total. Brown crashed five boundaries and one six before perishing to Lee Daggett, however Croft (51 not out) and Sajid Mahmood saw Lancashire to one of their highest totals of the campaign.
Northamptonshire's run chase was stymied by the continuous loss of wickets and only Alex Wakely (28 off 18) and Niall O'Brien (21 off 22) posted any scores of note.