Treating someone more or less favourably on the grounds of a protected characteristic. There are four types of unlawful discrimination which can occur.
Direct Discrimination
Direct discrimination is where a person is or would be treated less favourably from another because of a protected characteristic they have or are thought to have i.e. sex, gender reassignment, race, religion or belief (or a lack of belief), pregnancy and maternity, marriage/civil partnership, sexual orientation, disability or age.
Associative Discrimination
This is direct discrimination against someone because they associate with another person who possesses a protected characteristic (i.e. sex, gender reassignment, race, religion or belief (or a lack of belief), sexual orientation, disability or age).
Perceptive Discrimination
This is direct discrimination against an individual because others think they possess a particular protected characteristic (i.e. sex, gender reassignment, race, religion or belief (or a lack of belief), sexual orientation, disability or age). It applies even if the person does not actually possess that characteristic.
Indirect Discrimination
Indirect discrimination is where a condition, rule, policy or practice is applied to everyone but particularly disadvantages people who share a protected characteristic (i.e. sex, gender reassignment, race, religion or belief (or a lack of belief), marriage and civil partnership, sexual orientation, disability or age).