The Tesla chief executive, Elon Musk, has said Brexit uncertainty played a role in the firm’s decision to build its first European factory in Germany rather than the UK. The billionaire entrepreneur revealed that the firm’s European battery plant would be built on the outskirts of Berlin. Speaking to Auto Express after making the announcement, Musk said: “Brexit [uncertainty] made it too risky to put a Gigafactory in the UK.” The US electric carmaker also plans to locate a research and development base in the German capital.