Keith Barker dented Nottinghamshire's hopes of climbing to the top of the Specsavers County Championship table with a late blitz at Trent Bridge. Barker removed Steve Mullaney and Michael Lumb inside a four-over burst as the home side were reduced to 21 for three as they chased 227 for victory. Warwickshire had earlier managed just 236 in their second innings with opener Varun Chopra top-scoring with 82 as Luke Fletcher and Samit Patel took four wickets each.