Yes, CCTV is legal, but its use is governed by various laws, including the Data Protection Act 2018 (which incorporates GDPR) and the Human Rights Act. For domestic use, it’s generally less regulated, but you must respect neighbours’ privacy. For businesses, strict rules apply regarding signage, data retention, and how footage is used and stored. It’s crucial to understand your obligations. For detailed guidance, please refer to the Information Commissioner’s Office (ICO) guidance on CCTV.