OK, I agree political correctness has gone a bit barmy in the UK, and yes I can see the benefit in being specific about post requirements from the offset - it can save both the employer and potential applicants time and effort. But, other than the visa issue mentioned by tinkerbell, what reasons are there for restricting vacancies to people of a certain nationality? For example, I think it's a bit narrow-minded to assume that only Indonesian guys can cook Indonesian food...