How does the film represent dystopian britain as a nation?

This image here shows Chancellor Sutler leading a rally just like Adolf Hitler did with his speech. also the flag is similar to the Nazi flag. This could reflect that the ideals of the government could reflect the ideals of the Nazi party. Another point that this film represents a dystopian Britain is that there is no sign of a British flag, which could show how they have have removed the national British identity.