Having listened to Chamberlain, who was still somewhere between himself and Halifax, Churchill suggested that nothing should be decided about future conduct of the war, including any negotiated settlement, until the evacuation of the BEF from Dunkirk was completed. While he acknowledged that Operation Dynamo might fail, he was optimistic that a significant portion of the BEF would be saved, but much depended on air superiority. The war cabinet decided that Halifax must write, for discussion on Monday, the draft of a communication to Italy (this was circulated as paper no. "WP (40) 170"), together with a record of his latest meeting with Bastianini. It was also agreed, at Churchill's suggestion or insistence, that Sinclair should become a "de facto" member of the war cabinet ahead of future discussions about Italy. While Churchill may already have gained the support of the two Labour members, he needed Sinclair as Liberal Party leader to strengthen his position.