14:255 Live Formula 12013Singapore GP 2nd practiceBBC Radio 5 Sports Extra Duration: 1 hour, 40 minutes Fri 20th Sep 2013, 14:25 on BBC Radio 5 Sports ExtraLive F1 coverage of the second practice session ahead of the Singapore Grand Prix.GenresSportFormula OneBrand5 Live Formula 1Series5 Live Formula 1: 2013 Source: BBC Online