大象传媒

The last two general elections and the European referendum had one thing in common - they were not happy times for the pollsters.

Anxious to find out why the actual results have differed from most predictions, a committee of peers has been hearing from an expert pollster, familiar to viewers of Election night programmes.

Mandy Baker reports.

You can hear more from Today in Parliament on 大象传媒 Radio 4 weeknights at 23.30 - or find previous episodes of the programme via the 大象传媒 iPlayer.