Lancashire 504 for 8 dec (Livingstone 224, Chanderpaul 95) and 42 for 2 beat Warwickshire 200 and 275 for 6 (Ambrose 104, Sibley 57, McLaren 3-80, Parkinson 3-44) by eight wickets
Lancashire completed their sixth Specsavers County Championship victory of the season from 10 matches as they chased down a target of 41 to beat Warwickshire at Emirates Old Trafford.
The Red Rose county, second in Division One, boosted their chances of winning a second title in seven years by completing a maximum 24-point win by eight wickets during the fourth afternoon.
But they were left waiting to see if Somerset could do them a favour by hanging on for the draw against leaders Essex which would reduce Essex's lead from 36 points to 25.
Tim Ambrose's 16th career first-class century, an excellent 104 off 198 balls, at least ensured Warwickshire avoided a fifth innings defeat of 2017 as they posted a second-innings total of 344.
But, still, their sixth defeat in 10 leaves them in a perilous situation at the bottom of the table, having only taken two points.They are more than 30 points adrift of safety with four games remaining.
There was no play possible before lunch due to rain, but play started at 1.10pm with a minimum of 72 overs to be bowled.
The Bears started on 275 for 6 in their second innings, trailing by 29, with Ambrose unbeaten on 76 and Jeetan Patel 18. Ambrose reached his ton off 156 balls in the 88th over, the third over of play, as the pair shared a stand of 86 inside 20 overs.
That partnership was ended when home captain Ryan McLaren trapped Patel lbw for 30. Kyle Jarvis then bowled Chris Wright with one that kept a touch low in the next over to leave the score at 326 for 8.
Warwickshire were helped along by the addition of five penalty runs when a Matthew Parkinson delivery beat everyone in his first over of the day, including batsman Olly Stone, and hit the helmet placed behind wicketkeeper Alex Davies.
But the leg-spinner struck in his second, the 103rd of the innings, when he had Ambrose lbw with 339 on the board, a lead of 35.
Jarvis wrapped up the innings with his eighth wicket of the match when he uprooted Ryan Sidebottom's middle and off stumps in the next over, leaving Lancashire with 51 overs to chase their target.
Alex Davies took two boundaries off Keith Barker's first over, but he fell lbw to the same bowling in the fifth. Haseeb Hameed launched Patel's off-spin for six over long-on, but he was also lbw in Barker's next over for 21 before victory was secured.