Millions people in the UK who have a long-term mental or physical impairment are covered by the DDA - these could be either customers or employees but very few are wheelchair bound
Arthritis - 1 in 33 people over the age of 55
Phased in since 1995, the legislation covers all aspects of service provision & employment. The last phase covers reasonable physical adjustments.
The DDA is not prescriptive and so no-one can categorically say they comply. The emphasis is on accessibility to your services and employment where it is reasonable ands you are not required to bankrupt your business.
Access plans for inclusive environments required for building control and many licensing authorities are now looking at accessibility issues.