In second batch of leaked cables, Kim Darroch said White House was dead set on 'diplomatic vandalism, seemingly for ideological and personality reasons'

Though both countries have long touted their 'special relationship,' ties have previously gone through rough patches over Suez Crisis, Cold War spies

Darroch quits over publication of letter in which he calls White House 'uniquely dysfunctional'; May says resignation, day after Johnson fails to back envoy, is 'matter of regret'

After British PM remains supportive of ambassador who described US leader as 'inept,' president says 'good news' is that UK will soon have a new premier