LONDON (Reuters) – British Prime Minister Boris Johnson should resign, a lawmaker in his Conservative Party said on Twitter, announcing he had submitted a letter of no confidence. Johnson has so far weathered calls to quit over parties held in his Downing Street residence and office during coronavirus lockdowns. “After a great deal of soul-searching, I have reached the conclusion that the Prime Minister should resign,” said Peter Aldous, the Member of Parliament for Waveney, eastern England. “I have never taken such action before and had hoped that I would not be put in such an invidious posit…