I was in the British Foreign and Commonwealth Office for over 20 years and a member of its senior management structure for six years, I served in five countries and took part in 13 formal international negotiations, including the UN Convention of the Law of the Sea and a whole series of maritime boundary treaties. I headed the FCO section of a multidepartmental organisation monitoring the arms embargo on Iraq.

I am an instinctively friendly, open but unassuming person who always found it easy to get on with people, I think because I make fun of myself a lot. I have in consequence a great many friends among ex-colleagues in both British and foregin diplomatic services, security services and militaries.

I lost very few friends when I left the FCO over torture and rendition. In fact I seemed to gain several degrees of warmth with a great many acquantances still on the inside. And I have become known as a reliable outlet for grumbles, who as an ex-insider knows how to handle a discreet and unintercepted conversation.

What I was being told last night was very interesting indeed. NATO HQ in Brussels is today a very unhappy place. There is a strong understanding among the various national militaries that an attack by Israel on a NATO member flagged ship in international waters is an event to which NATO is obliged - legally obliged, as a matter of treaty - to react.

I must be plain - nobody wants or expects military action against Israel. But there is an uneasy recognition that in theory that ought to be on the table, and that NATO is obliged to do something robust to defend Turkey.

Mutual military support of each other is the entire raison d'etre of NATO. You must also remember that to the NATO military the freedom of the high seas guaranteed by the UN Convention on the Law of the Sea is a vital alliance interest which officers have been conditioned to uphold their whole career.

That is why Turkey was extremely shrewd in reacting immediately to the Israeli attack by calling an emergency NATO meeting. It is why, after the appalling US reaction to the attack with its refusal to name Israel, President Obama has now made a point of phoning President Erdogan to condole.

Israeli Murders, NATO and Afghanistan