Yorkshire have the chance to claim the LV= County Championship Division Two title after their promotion to Division One was confirmed last night.
Glamorgan’s win meant Kent could not catch Yorkshire, who head into today’s final day against Essex battling with long-time leaders Derbyshire for the title.
Yorkshire will take the crown if they win and Derbyshire fail to get victory against Hampshire.
Their first task is to bowl Essex out a second time after leaving them a target of 388.
Yorkshire declared their second innings on 252 for eight with Adam Lyth making 51 and Azeem Rafiq hitting an unbeaten 75.
By the close, Essex had already lost openers Jaik Mickleburgh and Tom Westley in moving to 28 for two.
Derbyshire celebrated their first ever promotion to make it a day to remember for Ross Whiteley who marked his 24th birthday with an unbeaten half-century and two late wickets against Hampshire at Derby.
Whiteley scored an undefeated 57 out of 275 and then took two for six from five overs to give Derbyshire the advantage going into the final day of the season.
Kent’s defeat at Glamorgan sealed Derbyshire’s place in Division One next season and they will go up as champions if they beat Hampshire who closed day three on 142 for six, only 139 ahead, with Bilal Shafayat unbeaten on 52.