|LV= County Championship Division Two, Emirates Old Trafford|
|Leicestershire 207 & 119: Robson 27; Jarvis 5-44, Lilley 4-28|
|Lancashire 483: Prince 104, Brown 96; Naik 8-179|
|Lancashire won by an innings and 157 runs|
|Lancashire 23 pts, Leicestershire 2 pts|
Championship Division Two leaders Lancashire thrashed Leicestershire by an innings and 157 runs inside three days at Old Trafford.
Jigar Naik took a career-best 8-179 as the hosts moved from their overnight score of 314-4 to 483 all out at lunch.
Ashwell Prince hit his fourth Championship ton of the season before he was stumped off Naik for 104, while Arron Lilley added an aggressive 59.
The visitors were then bowled out for 119 as Kyle Jarvis took 5-44.
Leicestershire's batsmen had few answers against the country's leading wicket-taker Jarvis, who now has 55 scalps, and off-spinner Lilley (4-28) as they lost their last seven wickets for 34 runs.
Earlier, Naik's eight-wicket haul was due in part to the attacking intent Lancashire's batsmen showed, led by Lilley's 41-ball knock, as they scored 169 runs in 28.3 overs before lunch.
South African left-hander Prince, who now has 939 first-class runs to his name in 2015, was one of three stumpings from Naik's end as the hosts' lower order looked to add quick runs.
Lancashire, who were relegated from Division One last season, are now 83 points clear of Glamorgan in third, with the top two teams winning promotion.
But the Welsh county, who are currently playing second-placed Surrey, have three games in hand.
Lancashire cricket director and head coach Ashley Giles:
"That was a great week. I guess at the start of the season, you identify these two games against Leicestershire, with all due respect to them, as games you really want to win.
"We've done that home and away. There might be a bit of weather around tomorrow, so we stressed the importance this morning of trying to force a result today if we could.
"That meant batting well this morning and bowling well, and we did exactly that. All credit to the guys."
Leicestershire head coach Andrew McDonald:
"We were pretty poor over these last three days, in particular with the batting efforts. Collectively, in two innings just over 300 runs, we've got to get better and we've got to improve.
"We were never in the game, and we've got to get back to the drawing board.
"We won the toss on a nice surface, good for batting, and we threw away the opportunity to drive the game. (To score) 207 on a good wicket after winning the toss was well below par.
"It's really disappointing to have this game over before the end of day three."