If you are not registered with a doctor but need to see one, you can receive emergency treatment for 14 days. After 14 days you will need to register as a temporary or permanent patient.
To register as a temporary resident you will need to complete a Temporary Resident Form.
You can register as a temporary resident with a GP in England if you are in the area for longer than 24 hours but less than three months.
For further information please visit the NHS Choices Website.