The 1909 Cinematograph Act used the term ‘inflammable films’ in a literal sense – cellulose nitrate catches fire easily – but some local authorities interpreted it to mean ‘morally dangerous’, and it led to censorship. Still, the act wasn’t as confusing as the latest flurry of communication from the British government. One of its requirements was that exhibitors provide fire exits, which led to the emergence of purpose-built picture houses. Many of the buildings are still standing, though few of them are still cinemas.