The 'status' of the American Indian tribes is that they are an independent and autonomous nation.
Their nations exist within the borders of the USA, NO DIFFERENT, than the nation of Palestine exists within the borders of Israel.
If the British Consolate accepts the autonomy of Palestine, then, it is obvious the consulate is discriminating against the native American nation of Iroquois.
They cannot accept a USA Passport, it would be illegal.
The Secretary of State needs to advocate for their 'autonomous' recognition evidence by the treaties that have established these nations.
This is an outrage by the British. What is there problem?