"The Race Relations Act of 1965 outlaws discrimination on 'the grounds of colour, race or ethnic or national origin."

Again, implicit in that is that discrimination can be on the grounds of race, or of national origin. The two are clearly different, so while it may be discrimination, it is not racism.

By that logic, it isn't racist to discriminate on grounds of colour then either! Colour and race as just as separated in that definition as are race and national origin. Tell us why you think it's called the RACE Relations Act, Nigel...