At the start of the last day, the visitors required 135 with one wicket down and appeared to have the advantage but, on an unreliable pitch, White exerted a match-winning influence. He undermined the Northamptonshire innings with an opening burst, which brought him three wickets for five runs in the space of 17 balls.
There was some late resistance from the Leeds-born wicketkeeper David Ripley, who top-scored with 31 off 72 balls, but his 82-minute vigil was ended by Chris Silverwood, and White polished off the tail.
The Nottinghamshire all-rounder Chris Tolley hit his highest score to frustrate the Championship leaders, Glamorgan, at Colwyn Bay and earn his side an unlikely draw. Tolley, who scored 73 off 162 balls, found willing support first from Wayne Noon and then James Hindson and succeeded in defying Glamorgan's efforts to dislodge him.
Kent's hopes of a run chase to strengthen their challenge were dashed by rain when they were almost half way towards a target of 321 against Worcestershire at New Road.Reuse content