Karl Muller and the fatal lemon
Reading time: 6 minutes
Britain had been wary of foreign agents operating within its shores in the run up to the First World War, and the Secret Service Bureau – now commonly known as MI5 – had been established in 1909. It had found great success rounding up German spies when the conflict broke out. Nonetheless, it was vigilant that enemy operatives might attempt to send reports on Britain’s military and economy back home.
