Re an air drop John, as said without the RAF being effectively knock back it’s not going to work. Raids on airfields to try and achieve that could be one use, but to mount anything with the RAF fully operational would have been suicide.

On the ground Britain was not that poorly off for fighting men. In addition to the BEF evacuation from Dunqurque, there’s the often overlooked second evacuation from and around Cherbourg where all men and equipment were got away barring a broken truck and subsequently men lost in an air attack on shipping. Then there's the Commonwealth/Empire troops already arrived in Britain.

The Land Defence Volunteers (Home Guard) were up and running and were given priority to be armed. While it was hoped a few hundred thousand would volunteer, they actually swamped with over a million at the outset. They should not be thought of as ‘old men’, which in itself actually speaks quite highly. Firstly, Britain had by no means yet mobilised all men of fighting age and many when into the Home Guard while waiting for call-up. Secondly, the many of the older men were Veterans of the W.W.I and I really don’t see the 19 year old German was going to teach them anything of fighting a blood and guts war.

In June 1940 the Commandos started to be formed and were subsequently assigned over to Home Forces specifically to counter air invasion. Largely they were allocated tasks of the rapid reaction type, or airfield dense. Some were also tasked with covering some withdrawal aspects of regular forces from the coast inland, with no orders or provision dealing with their own withdrawal.

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