There is a new French ambassador arriving in London this week. He is Maurice Gourdault-Montagne, known as — what else? — MGM in Quai d’Orsay. It is fashionable to downplay the role of the ambassador in the modern world. Has not instant communication made the profession of diplomacy redundant? When the president of France and the prime minister of the United Kingdom see each other at EU, G8 or other meetings with more regularity than they talk to their ministers, who needs ambassadors? Moreover, with so much of the common business between France and Britain conducted at European level, surely it is in Brussels, not London and Paris, that problems between the two countries are resolved?Nothing could be further from the truth.