Yorkshire opener Adam Lyth scored his fifth century of the season to give the LV= County Championship Division One title chasers the upper hand in their crucial Roses battle against Lancashire.
Lyth, who is the competition’s top run-scorer, finished day two at Old Trafford 182 not out, the latest eye-catching contribution in a campaign that has thrust him firmly into England’s Test thoughts.
The White Rose closed on 396-5, a burgeoning lead of 116 that should offer a platform for victory.
While Lyth was the constant thorn in Lancashire’s side, there were also handy knocks from Alex Lees (40), New Zealander Kane Williamson (46), Jonny Bairstow (60) and Adil Rashid, who finished unbeaten on 44.
Yorkshire’s title push was further boosted by second-placed Nottinghamshire’s struggles at relegation-threatened Durham.
Home skipper Paul Collingwood came to the fore with bat and ball - taking 3-26 having previously picked up one scalp all season, then making an important 38no.