Does the Equality Act 2010 outlaw associative discrimination?

Under the Equality Act 2010, discrimination against a person because of his or her association with another person who has a protected characteristic is unlawful. Protection against associative discrimination covers age, disability, gender reassignment, race, religion or belief, sex and sexual orientation.

For example, if an employer decides not to promote an employee because it considers that he or she will not have time to concentrate on the job due to caring responsibilities for his or her disabled mother, this may be associative discrimination because of the employee's association with a disabled person.