As for the Anglo-Franco Strategic Plan he found a hiatus of it, from the events he concluded (today I'm gonna write many ordered lists I see):
1. the Anglos wanted to save their soldiers on the price of their allies', what they not just denied but they insinuated that their allies doing this on English expense;
2. the Allied command underestimated their opponent; they thought the Germans were badly equipped and their leadership was incompetent;
3. the French thought that since the Maginot line was so expensive, then it must be impregnable.
He harshly criticized the Allies, but he separates the Belgian army from them, and acknowledges and praises their steadfastness.
The Allies had seven months without interruptions and hindrance to execute an offensive plan to cross the Rhein and beat them the Germans between that and the Elbe. He guesses they might have planned this they just failed due to their lack of aptitude.