Interesting take on how they expected a bombing attack to materialize.

One has to remember that the mid-1930s was still strong time of the Douhetism and people believed “the bomber will always get through”. There is a clear civil defence agenda on the film as there was all over the country during that time.

However already during the filming, the old Junkers represented old strategy which concentrated on seaplanes. The new strategy materialized finally when the new and fast Bristol Blenheims were bought in 1936.