These details are from the written documents of the time and were shown on the BBC
Many people supported Hiler befor he came to power, bot in America and the UK.
They showed photographs of the Airfields both today and when they were built. I am sure if you trawl though the documents you will find the exact locations.
But you've already trawled through them, haven't you? After all, you came to your conclusion after a rational review of the evidence, right?
Since you've presumably already looked through all this, why not point me in the right direction with some sourced quotes?
Modern war plans were not invented they were designed for 1930's equivalents.
Today there are sufficient motorway sections.
So... the United States' freeways are evidence of a conspiracy to invade Canada and the UK?
Personally, I don't think they're evidence of anything but the United States' dependence on the car.
Grass airfields were used by fighter command in the UK right through ww2, they carried planes like the Dakota DC3 with no trouble. I flew daily from a grass runway at Lympne airport in a piper Aztec in the 70's to do aerial photography. The airport carried daily passenger flights to France. We still have many grass runways in the UK.
As in Canada. And while they're perfectly fine for landing a Cessna 152 or even a DC-3, they're not up to the task of handling an F/A-18 or a C-5 Galaxy.
But again: exactly where are these airfields? You mentioned that they were constructed at three locations. Which locations? Please be specific. And if you know, could you tell me the runway lengths and what ancillary facilities were provided?