Stationery Shop › Smoke Detector and Carbon Monoxide Letter Image 1 of 1 Smoke Detector and Carbon Monoxide Letter £15.00 Letter for agents to send to landlords about the Smoke and Carbon Monoxide Alarm (Amendment) Regulations 2022. Add To Cart Added! Letter for agents to send to landlords about the Smoke and Carbon Monoxide Alarm (Amendment) Regulations 2022. You Might Also Like Holding Deposit Form - TFA 2019 £39.00 Property Information Questionnaire £39.00 Terms of Business - Fully Managed £350.00 Addendum for Variation or Novation of a contract £0.00 Assured Periodic Tenancy £250.00