There never was an invasion of any sort on the coast of Britain, had there been, and if it had been "Covered up" it would have soon got out....

The coast was watched everwhere...
As to the beaches on fire, there definately were places where oil pipes had been run out into the sea, Theses would have been ignited as the supposed invasion fleet were about to land.

No foreign troops set foot on Britains coast during the war...Only if they been captured.
Brian.