off if it did not "rupture" the German front within 48 hours. Looking for an alternative to more months of attrition warfare, British and French political leaders supported Nivelle's proposal. Relations with the British Field Marshal Sir Douglas Haig, commander of the British Expeditionary Force (BEF) on the Western Front, had already agreed with Joffre that the British would launch wearing-out attacks in 1917, but demanded (6 January) written confirmation of Nivelle's earlier assurance that if the plan did not succeed in forcing a general German withdrawal, Nivelle would take over British line to free up British reserves for his planned Flanders offensive. By Edward Spears' account Nivelle accused Haig of having "une idée fixe" about Flanders and of trying to "hog all the blanket for himself" rather than seeing the front as a whole. David Lloyd George, the British Prime Minister, backed Nivelle because he thought he had "proved himself to be a Man" at Verdun. Field Marshal Haig wanted to delay his attack until May to coincide with Italian and Russian attacks, but was told to be ready no later than 1 April, and to take over French line as requested. The British government ordered him to live up to both the "letter" and "spirit" of the agreement with Nivelle, and not cause delays, almost certainly a result of private lobbying by Nivelle. Lloyd George had a long conversation (15 February) with Major Berthier de Sauvigny, a French liaison officer in London, telling him that Haig needed to be subordinated to Nivelle for the offensive, as George Milne had been subordinated to Sarrail at Salonika, and if necessary he would be replaced. The British War Cabinet felt that the French generals and staff had shown themselves more skilled than the British in 1916, whilst politically Britain had to give wholehearted support to what would probably be the last major French effort of the war. Haig blamed the poor state of the railways, demanding twice the railway requirements for half as many troops as the French. At the Calais Conference the railway experts were soon sent away, and although Nivelle became embarrassed when Lloyd George asked him to criticise Haig, he agreed to draw up rules for the relations between the British and French armies, to be binding also on their successors going forward. He proposed that the British forces be placed under his direct command (via a British