Vaas and O'Brien ensure Northants' lead
Northamptonshire's Niall O'Brien and Chaminda Vaas both came within a whisker of making centuries on the third day of their County Championship Division Two match with Essex at Wantage Road
Scorecard
Northamptonshire's Niall O'Brien and Chaminda Vaas both came within a whisker of making centuries on the third day of their County Championship Division Two match with Essex at Wantage Road