no standing army, a reliance on militias
How does one rely on "Militias" if the population is so unarmed that it does not even have pointed knives and the bobbies are armed with sticks?
Well,this is really a reversion to the pre-1914 situation, except that there is no empire. Hence no Royal navy and no colonial army. And remember that if in 1940 Hitler could have landed a couple of divisions in England, the Wehrmacht would have made short work of British resistance. Thinking further of course, the same would have been true in 1588. The Tudors effectively disarmed the English nobility and, hence, the people. The Spanish Infantry would have made hash of the England bands.