By William James LONDON (Reuters) – British Prime Minister Boris Johnson faced three new calls to resign from within his own Conservative Party on Wednesday, adding to the steadily growing number demanding he quit over a series of parties at Downing Street during lockdown. Police are investigating 12 different gatherings at the heart of the British state for breaches of the government’s own COVID-19 public health laws following an internal inquiry that criticised a “serious failures of leadership”. Weeks of media revelations about the parties – including a bring your own booze event attended b…