Because there were two factions in the British elite. The French were against going to war (yet, they wanted Hitler to crush the Soviets and then invade) but reluctantly did.
One, representing Capital, wanted the Soviets to fall at any cost but was sidelined due to Edward VIII causing a constitutional crisis. The other representing the British Civil Service and the Aristocracy, continued down the standard path of preventing a single power from dominating Europe and thought the Munich Conference was a line in the sand. Once Hitler invaded Czechoslovakia anyway they began mobilisation
Because there were two factions in the British elite. The French were against going to war (yet, they wanted Hitler to crush the Soviets and then invade) but reluctantly did.
One, representing Capital, wanted the Soviets to fall at any cost but was sidelined due to Edward VIII causing a constitutional crisis. The other representing the British Civil Service and the Aristocracy, continued down the standard path of preventing a single power from dominating Europe and thought the Munich Conference was a line in the sand. Once Hitler invaded Czechoslovakia anyway they began mobilisation