Complex sentence: Dressed as a porter on 30 September 1940 he arrested Werner Walti in Waverley railway station in Edinburgh, Walti having landed the same day by submarine with Karl Drucke at Buckie.
Split into simpler sentences: Dressed as a porter on 30 September, 1940 he arrested Werner Walti in Waverley railway station in Edinburgh. Walti had landed the same day by submarine with Karl Drucke at Buckie.