Police officers who wear body cameras have Tasered fewer suspects in West Yorkshire, a senior chief has said as figures show a drop in discharges.
Assistant Chief Constable Andy Battle said people "modify their behaviour" when cameras are switched on, leading to 27% fewer Taser incidents in 2017.
In 2016 West Yorkshire Police introduced body-worn video (BWV), which is used by forces across the UK.
ACC Battle said officers used "less force" but they will still use Tasers.