There are no privacy laws in this country. There is no such thing as invasion of privacy and it's not against the law.
One way round this, however, could be to try the Protection from Harassment Act 1997. A course of conduct which someone knows or ought to know amounts to harassment is illegal. (Harassment includes alarm and distress). So, if you communicate to the neighbour (once a month in writing and keep copies) that their camera is causing distress to you then after a while you'd be able to show a course of conduct. This would be an offence and therefore you would have some recourse to the Police.
e manno
November 2013