Nevertheless, the Belgian perseverance prevented the British Expeditionary Force from being outflanked and cut off from the coast, enabling the evacuation from Dunkirk. Alan Brooke who commanded II Corps of the BEF thought that the 10th Belgian Division was in the wrong place and wanted to deploy north of Brussels to avoid "double-banking". He was advised by Roger Keyes to see the King, and on 12 May was "making progress in getting matters put right" in discussion with the king in English, but was interrupted (twice) by the King's advisor who spoke to the King in French (in which Brooke was fluent). The advisor was insistent that the Belgian division could not be moved and the BEF should be stopped further south and clear of Brussels; Brooke said he was not putting the whole case to the king; he found that arguing with the advisor was a sheer waste of time as he cared little about the BEF and most of his suggestions were "fantastic". The King's advisor Van Overstraeten was not the Chief of Staff, as Brooke had assumed, but the king's aide-de-camp, with the rank of Major-General, and would not give up the Louvain front. The French liaison officer, General Champon, told Brooke that Van Overstraeten had ascendancy over the King and had taken control, so it was useless to see the Chief of Staff. Later (15 May) Brooke found that the BEF was likely to "have both flanks turned" with French defeats, and started withdrawal on 16 May.