Yes. It is a legal requirement to display signs in public places where CCTV cameras are in operation. The purpose of these signs is to make people aware that they are being monitored and recorded. In addition, the signs must specify who owns and operates the CCTV system and provide contact information for any queries or complaints about its use. Failing to follow this requirement may leave you open to prosecution or other legal action. Therefore, it is important that any CCTV system installed is compliant with relevant laws and regulations.