[BroJoeK]

"Help out my memory, when did the Brits use coordinated Air - Armor - and supported Infantry prior to the Blitzkrieg?"

Now you're testing me? OK, no problem ;-)

We should begin by noting that the Brits & French invented tanks, and first used them in the First World War.

The first great combined arms battle is said to have been Amiens, in August 1918, where the allies fielded 532 tanks and 1,900 aircraft.

W.W.I Battle of Amiens

The first serious "tank theorist" is said to be Britain's JFC Fuller:

Tank History

"In the inter-war period tanks underwent further mechanical development and, in terms of tactics, J.F.C. Fuller's doctrine of spearhead attacks with massed tank formations was the basis for work by Heinz Guderian in Germany, Percy Hobart in Britain, Adna R. Chaffee, Jr. in the U.S., Charles de Gaulle in France, and Mikhail Tukhachevsky in the USSR.

"All came to similar conclusions, but in the Second World War only Germany would put the theory into practice on a large scale, and it was their superior tactics, not superior weapons, that made blitzkrieg so formidable."

[investigateworld]

A tip of the old Glengarry to ya. The use of aviation - even as tactical scouts, brought all the elements I mentioned into play.