On 20 July, French Foreign Minister Georges Bonnet, told the Czechoslovak Ambassador in Paris that while France would declare her support in public to help the Czechoslovak negotiations, it was not prepared to go to war over the Sudetenland question.
Nekdanji britanski minister v liberalni vladi lord Runciman je tako prišel 3. avgusta v Prago z navodili prepričati Beneša, da sprejme načrt, sprejemljiv za sudetske Nemce.