Sirens is a British comedy-drama about an ambulance service team broadcast on Channel 4. It was first screened on 27 June 2011. The series is based on the book Blood, Sweat & Tea by Brian Kellett. The series is filmed predominantly in Leeds with some filmed in the surrounding areas. Locations featured including Headingley, Kirkstall, Adel, Hyde Park, Cookridge, Chapel Allerton and the main city centre including shopping areas of Briggate and Headrow. On 17 October 2011, Rhys Thomas and Channel 4 confirmed that there would not be a second series.