There are 6 different types of British nationality. These are:
You can apply for a British passport in the event that you have British nationality. Yet, there are a few conditions where your application can be denied or you're existing passport can be withheld.
You should have British nationality to apply for or hold a British identification.
Having British nationality doesn't promise you an identification. For instance, you may not get another international ID or you're existing visa might be taken from you if:
Individuals who have substantial reasons might be permitted to hold more than one international ID booklet. This applies ordinarily to individuals who travel every now and again on business, and may need an international ID booklet to go on while the other is anticipating a visa for another nation. Reasons and supporting documentation, (for example, a letter from a business) must be given.
Also, a person who has double British citizenship and British Overseas Territories citizenship are permitted to hold two British international IDs under various statuses at the same time.