I am always surprised that you get a thread about the French defeat and the performance of BEF is always brought up - not the Belgians who contributed 26 divisions or the Dutch with 10 DIvisions but the BEF with 9 Divisions (strictly speaking 8 Divisions and two Battalions) on the Dyle Front versus 90 French (in total) and 51st Highland Division on the Maginot. The remaining 3 British Divisions were non-combatant building infrastructure, airfields, depots, rail etc with minimal military experience. I have not read Manstein's Biography which is cited by Kai-Petri but many of the "facts" are quite wrong. Since Manstein had been banished to East Prussia during the Battle of France, he certainly did not have any first hand experience of the conflict. The above is the Command structure. You can see how far down the chain was Gort. He did not have access to Petain and his remit from the British Government was very narrow _ I can get the exact words if necessary but essentially he was to obey faithfully the orders of His Commander - Billotte after 12 May (and Blanchard when Billotte was killed in car crash on 21st May). However, in the extremely unlikely event that he believed the Order given to him imperilled the existence of the BEF, he could appeal to the British Government. Although there were Liaison Officers the British realised this was not adequate and when fighting with later with the Americans were determined to interlace the top Command Structure American\British General etc - which despite the frictions was a lot more successful. The dispensation given to Gort did not extend to his subordinate commanders and thus General Fortune, Commander of 51st Highland Division which was left behind on the Somme after Dunkirk, could not avail himself of this dispensation - unfortunately this lead to the destruction of these fine Scottish soldiers (although it is extremely likely that Churchill would have sacrificed this Division in case to maintain the French in the battle).