Championship form offers few play-off clues despite Bristol dominance

• Andy Robinson’s Bristol finished 16 points clear of Doncaster• Table-toppers lost at home to Yorkshire Carnegie and BedfordThe Championship play-offs start on Sunday and, while Bristol topped the table by 16 points from Doncaster and finished 31 points ahead of their semi-final opponents, Bedford, their record this season against the top four does not stand out.It is seven years since Bristol, whose director of rugby is the former England coach Andy Robinson, were last in the Premiership and in recent years they have contrived various ways of tripping up in the play-offs, losing to Exeter, L…