What services and treatments are free for everyone?

There are some situations where initial treatment is available free on the NHS to all overseas visitors. These include:
emergency treatment – this may be in an accident and emergency (A&E) department, a walk-in centre or a GP surgery

Registering with a GP

Under current rules anyone can register with a GP practice in England and receive free primary care. A GP practice can only refuse an application to join its list of NHS patients where it has reasonable grounds for doing so: for example, if their lists are closed to new patients, the applicant lives in a different practice's boundary area, or in other rare circumstances.
Once registered as a NHS patient, primary care services provided by a GP practice are free, but secondary care services (such as a referral to a specialist) are not free simply because you're registered with a GP.
If you have problems registering with a GP, you can try a different practice or ask for the assistance of the local clinical commissioning group.
If you have problems getting an appointment, you can try a walk-in centre or GP-led health centre. Registration is not required and patients do not need an appointment. Most centres are open 365 days a year and outside office hours.
For more information, see How do I register with a GP?
Emergency treatment

Regardless of your residential status or nationality, you're entitled to free emergency NHS treatment from:
a primary care practice, such as a GP practice
an A&E department
an NHS walk-in centre