News Snapshot:
LONDON, Nov 13 (Reuters) - Seven years ago, David Cameron left Downing Street after his big gamble to hold a referendum on Britain's membership of the European Union backfired and brought his six-year term as prime minister to an end. A few months later his political career appeared to be over as he resigned his seat in parliament, with opponents blaming him for the defeat in the referendum in which he had campaigned for "remain" and Brexit supporters saying he had failed to implement a proper strategy to prepare for departure. News that he had been appointed foreign secretary by...