German cake and biscuit manufacturer Bahlsen relied heavily on forced labour during the Nazi years and benefited from close ties to the Nazi regime, according to the results of a historical investigation into the company. Business for Bahlsen, best-known as the makers of Leibniz biscuits and Pick Up chocolate sandwich biscuits, increased enormously during the Nazi years in Germany, according to historians Manfred Grieger and Hartmut Berghoff. They found that the 135-year-old company used more than 800 forced labourers between 1940 and 1945, many of them women from Ukraine and Poland. Those lab…