Alan is one of the Principal Investigators on the Verifiable Autonomy project (which employs me for half my time). He has a long standing interest in the various aspects of ethics and robotics, both how a robot might be programmed to behave ethically and the ethical issues surrounding the use of robots in homes, workplaces and other places. He is also involved in a number of committees involving robotics. He blogs about his work at Alan Winfield's Web Log, both reporting on current research in an accessible fashion, and discussing various activities he has been involved with. It's not a high volume blog, but worth checking out if you are interested in these kinds of issues. He's also active on twitter (alan_winfield) and, I get the impression, very much enjoys discussing his work, ethics and robotics with people.