Millions of Brits are terrified of Friday the 13th, refuse to walk under ladders and avoid crossing the path of a black cat, a study has found. <br /><br />Researchers found that half the population describe themselves as 'superstitious', with one in five dreading the arrival of the unluckiest date in the calendar. <br /><br />One in six adults believe Friday the 13th poses the greatest risk of bad luck and consider it unluckier than black cats, broken mirrors and spilled salt.
