Data Subject

What the law says:

"data subject" means an individual who is the subject of the personal data.

What it means:

The data subject is the living natural person the information is about or relates to.

A data subject does not necessarily have a direct relationship with the data controller. For example, CCTV is often installed as a crime prevention measure. If images of an individual walking past premises are captured on CCTV these images are the personal data of that individual. 

Data subjects have rights in respect of the processing of their personal data, including a right of access to that personal data.