66 years on and the argument is still the same.
Here's the Allies first true "Joint Operation" - Operation Dynamo or 'Dunkirk' as it more commonly known...
Subjected to an utterly exhausting and terrifying experience, our soldiers and sailors returned home with a single question on their lips—'Where was the R.A.F.?'
and
...rather it told them that they could have held the enemy on the ground if only the Royal Air Force had played its part in the air.
In fact RAF squadrons supporting Operation Dynamo had carried out 171 reconnaissance, 651 bombing, and 2,739 fighter sorties and had suffered 177 aircraft destroyed or seriously damaged including 107 fighters and 87 pilots, leaving Fighter Command with just 331 serviceable fighters to defend the homeland.
What's Dunkirk got to do with it? Well,
"Just because you can't see them, doesn't mean they're not there."
Per Ardua Ad Astra. With emphasis on the Ardua.