evidence: There was no single moment during the flu outbreak when all the cinemas in the UK shut, and some jurisdictions simply imposed mitigating measures. In London, cinemas were required to be ventilated for 30 minutes every three hours. Those in Wolverhampton banned children and removed carpets. A Walsall cinema showed a 15-minute public information film that featured a Dr Wise and a foolish patient. The advantage of this piecemeal localised policy-making for the industry was that, with films struck onto celluloid prints, and canisters moving from cinema to cinema, movies could shift around to areas that did not have restrictions in place.