Fire
Since 1st October 2015, all rented properties are covered by regulations which require smoke alarms to be fitted, at least one on each floor, and they must be tested to ensure they are in working order on the first day of the tenancy (when the tenant must sign to confirm the checks have been carried out) and, thereafter, the tenant is responsible for the upkeep of the alarm and the landlord must check them annually. By checking, you should not rely on just pressing the red button, which just checks the battery, but use a smoke spray to ensure that the actual detection system is working.