My employer wants to use AI to monitor employee productivity through webcam analysis and I want to know if this is legal

I received a notice last week that my company is piloting an AI-powered productivity monitoring tool. The notice was vague but follow-up questions to HR revealed that it involves webcam-based attention tracking, monitoring whether employees are looking at their screens, and keystroke analysis. The stated purpose is to improve productivity measurement for remote workers.

I work remotely. I am in the UK. I do not know whether this is legal. I do not know whether I can refuse. I do not know whether the data collected could be used in performance reviews or disciplinary processes. The HR team seemed uncertain about the answers to these questions themselves.

I am not a troublemaker. I do my job well and I have nothing to hide in any meaningful sense. But the idea of my face being analysed by an algorithm for eight hours a day feels like a significant line being crossed. What are my actual rights here and where do I find out?