[Juha]

"Gp Capt Harris, the later Butcher, wrote this in September 1936 to Ellington about the Air Staff's veto the Army's plane for a force to occupy the Low Countries to prevent a knockout blow by the LW against London"

Tony, read a good book on British political history on 30s and you will see that the possibility to get funding for a ground force to invade the Low Countries was nil in 1936. RAF meddling or not.

"from its own discussions by the Secretary of State for Air with Stumpf in 1937 that the Germans planned no knockout blow"

Now do you really believe that if the LW had had plans for a knockout blow against UK, Stumpf would have admited it to British in 1937 when asked on it? So if Stumpf said that LW had not such a plan, it didn't matter.

Remember, Germans defeated both the French and British armies and the British were very junior partner in ground war then. Just as the British had hoped. It's not because of RAF, historically British didn't like permanent armies and over that came the experiences of WWI trench warfare.
IIRC Germany had 136 divisions, British had 10-12 in France. BEF was small as it had been in 1914, the idea was that the French carried the main burden of ground warfare, after all the fight was in France. BEF role was to show commintment to common cause, of course also to help French, but its role was that of minor partner.

And the French had more guns and clearly more heavy guns than Germans and lot of tanks which were better armoured than the best of German tanks and most of their tanks were designed to use as infantry support vehicles, so what went wrong?

Juha