LONDON - Prime Minister Benjamin Netanyahu appealed to Britain to join new sanctions against Iran as he met his British counterpart Theresa May in London on Monday, while she cautioned about Israel's plans for new settlements.Netanyahu said "responsible" nations should follow new US President Donald Trump's imposition of sanctions against Iran following a ballistic missile test."Iran seeks to annihilate Israel, it seeks to conquer the Middle East, it threatens Europe, it threatens the West, it threatens the world. And it offers provocation after provocation," Netanyahu told May ahead of their meeting."That's why I welcome President Trump's assistance of new sanctions against Iran, I think other nations should follow suit, certainly responsible nations. I'd like to talk to you about how we can ensure that Iran's aggression does not go unanswered."