Introduction
The Disability Discrimination Act 1995 (DDA) imposes a duty on employers to make reasonable adjustments to premises or working practices to take account of the needs of a disabled employee or job applicant.

Where "a provision, criterion or practice applied by or on behalf of an employer, or any physical feature of premises occupied by the employer, places the disabled person concerned at a substantial disadvantage in comparison with persons who are not disabled, it is the duty of the employer to take such steps as it is reasonable, in all the circumstances of the case, for him to have to take in order to prevent the provision, criterion or practice, or physical feature, having that effect" (section 4A(1),