Hi   Last night, every exhibition manager’s worst nightmare came true.   vandals broke into the hall for the Market Deeping MRC show in Stamford.   The show has had to be cancelled.   The hall is a crime scene and is out of bounds   the layouts and stands have been totally destroyed.   the perpetrators have been apprehended, but that is little comfort to the exhibitors whose layouts and displays have been ruined.   I was due t