There seem to be a great many elements that fortuitously prevented the UK from going the way of Italy and Germany or the USSR. The most obvious was the presence of a large middle class with a vested interest in maintaining social stability. Another important aspect was that most politicians back then weren't chasing votes with the cynical desperation that's habitual today. Thus rather than trying to chase fascist votes by promoting fascist policies, the British political class of the early 20th century abjured cravenly bowing to the mindless populism that is eating away at our own societies today. We must not think that some good fortune nearly a century ago is any kind of indicator of the likely outcome of our own deep and persistent malaise.