What is the right to bring a claim for discrimination arising from disability under the Equality Act 2010?

Section 15 of the Equality Act 2010 provides for claims of discrimination arising from disability. It is unlawful for an employer to treat an employee unfavourably because of something arising in consequence of their disability (for example, the need for the employee to attend regular hospital appointments because of their disability) where the employer knows, or could reasonably be expected to know, that the employee has a disability. An employer may successfully defend a claim if it can justify the unfavourable treatment on the basis that it is a proportionate means of achieving a legitimate aim.