There are few genocides more clearly established than that suffered by the Armenians in 1915-16, when half the race was extinguished in massacres and deportations directed by the Young Turk government. Today you can be prosecuted in France and other European countries for denying the slaughter. But the world's most influential genocide denier - other than Turkey itself - is the British government, which has
repeatedly asserted that there is insufficient evidence that what it terms a "tragedy" amounted to genocide. Now, thanks to the Freedom of
Information Act, we learn that (in the words of Foreign Office memos) commercial and political relations with Turkey have required abandoning "the ethical dimension".
For the past ten years, various Foreign Office ministers, from Geoff Hoon to Mark Malloch Brown, have told parliament that "neither this government nor previous governments have judged that the evidence is sufficiently unequivocal to persuade us that these events should be categorised as genocide, as defined by the 1948 convention". This would have come as a shock to the architects of the 1948 UN Convention on Genocide (for whom the Armenian genocide was second only to the Holocaust), as well as to the wartime British government, which accused the Turks of proceeding "systematically to exterminate a whole race out of their domain". (Winston Churchill described it as "an administrative holocaust . . . there is no reasonable doubt that this crime was executed for political reasons".)
What does the Foreign Office know that eluded our government at the time as well as the drafters of the Genocide Convention, not to mention the International Association of Genocide Scholars, the US House committee on foreign affairs and at least nine other European governments? The Freedom of Information Act has now unravelled this mystery.
The Armenian Centre in London obtained hundreds of pages of hitherto secret memorandums, bearing the astonishing admission that there was no "evidence" that had ever been looked at and there had never been a "judgment" at all. Parliament had been misinformed: as the Foreign Office now admits, "there is no collection of documents, publications and reports by historians, held on the relevant files, or any evidence that a series of documents were submitted to ministers for consideration". In any case, ministers repeatedly asserted that, "in the absence of unequivocal evidence to show that the Ottoman administration took a specific decision to eliminate the Armenians under their control at the time, British governments have not recognised the events of 1915-16 as genocide".
That was the answer given by the government during the House of Lords debate on the subject in 1999. The thinking behind the genocide denial is revealed in an internal memorandum to ministers (Joyce Quin and Baroness Symons) before the debate: "HMG is open to criticism in terms of the ethical dimension, but given the importance of our relations (political, strategic and commercial) with Turkey . . . the current line is the only feasible option."
An inconvenient truth
Nobody noticed that this "current line" was a legal nonsense. To prove genocide, you do not need unequivocal evidence of a specific government decision to eliminate a race - neither the Nazis nor the Hutu government in Rwanda ever voted to do so or recorded any such decision. Genocidal intentions are inferred from what governments do and from what they knew at the time they did it; and it was obvious to everyone in Armenia (including diplomats and missionaries from Germany, then allied to Turkey, and to neutral US ambassadors) that the deportations had turned into death marches, and the massacres were influenced by race hatred fanned by the government's "Turkification" campaign. The internal documents show that the Foreign Office has never had the slightest interest in the law of genocide: its stance throughout is that the UK cannot recognise this particular genocide, not because it had not taken place, but because realpolitik makes it inconvenient.
There is no suggestion in these documents that expert legal advice was ever sought before ministers were wrongly briefed on the law of genocide. The definition of the crime includes "deliberately inflicting on the group conditions of life calculated to bring about its physical destruction in whole or in part" - a precise description of the Ottoman government's orders to deport two million Armenians to the Syrian Desert, in the course of which hundreds of thousands were murdered or died of starvation. Courts in The Hague have actively developed the law relating to genocide in recent years, but the Foreign Office memos make no reference to this - its only concern is that ministers should say nothing which might discomfort a Turkish government that it describes as "neuralgic" about its accountability.
The documents show how Foreign Office officials have discouraged ministers from attending memorial services for Armenian victims and from including any reference to this genocide at Holocaust Memorial Day. They advised Margaret Beckett, Geoff Hoon and Kim Howells to absent themselves from the Armenian genocide memorial day in 2007. It is no business of the Foreign Office to discourage ministers from attending memorial services for victims of crimes against humanity.Notable in these hitherto secret documents is how government ministers parrot their Foreign Office briefs in parliament word for word and never challenge the advice provided by diplomats. None of them has ever pointed out, for example, that the "not sufficiently unequivocal" test is oxymoronic - evidence is either equivocal or it is not. It cannot be a little bit unequivocal.
The other routine excuse for denying the genocide has been that "it is for historians, not governments, to interpret the past". This "line" was described in 1999 as "long-standing". But genocide is a matter for legal judgment, not a matter for historians, and there is no dispute about the Armenian genocide among legal scholars. Yet Foreign Office ministers insist that the "interpretation of events is still the subject of genuine debate among historians". This "line" was stoutly maintained until last year, when it was placed on the Downing Street website in response to an e-petition and provoked angry replies from the public. The minister, by now Jim Murphy, was displeased, and became the first to demand to know just what evidence the Foreign Office had looked at.
The Eastern Department had looked at no evidence at all. In great haste, it came up with three historians - Bernard Lewis (who had been prosecuted in France for denying the genocide, but then told Le Monde that he did not dispute that hundreds of thousands of Armenians had died), Justin McCarthy (a Kentucky professor whose pro-Turkish work was sent to Keith Vaz, then a minister at the Foreign Office, by the Turkish ambassador) and Heath Lowry, who, although he does not put his own name to denials of the genocide, provoked dispute at Princeton after it accepted funds from the Turkish government to endow his "Atatürk Chair" and he was then exposed as having helped draft a letter in which the Turkish ambassador denounced a scholar for writing about the genocide. It is astonishing, given the number of British historians, from Arnold Toynbee onwards, who have no doubts on the subject, that the Foreign Office should grasp at the straw of three controversial Americans.
Will we remember?
The head of the department later told Murphy that it had stopped "deploying this line" because "we found that references to historians tended to raise further questions". Malloch Brown proceeded to read out the old mantra that "neither this government nor previous governments have judged that the evidence is sufficiently unequivocal" on his behalf, even though no government had actually "judged" or received any evidence at all.Parliament has been routinely misinformed by ministers who have recited Foreign Office briefs without questioning their accuracy. The government's only policy has been to evade giving any truthful answer about the Armenian genocide, because it has abandoned "the ethical dimension" in the interests of relations with a Turkish government that it acknowledges to be unbalanced in its attitude to this issue.
In August 1939, Adolf Hitler exhorted his generals to show no mercy to the Polish people they were preparing to blitzkrieg because, "After all, who now remembers the annihilation of the Armenians?" If the ethics-free zone in the Foreign Office has its way, nobody in the UK will remember them either.
Geoffrey Robertson, QC is the author of "Crimes Against Humanity: the Struggle for Global Justice" (Penguin, £14.99)
His full opinion on the Armenian genocide and the Foreign Office documents can be obtained for free from firstname.lastname@example.org 
His email is email@example.com