Riding for the Disabled Association
The Riding for the Disabled Association (RDA) is a United Kingdom based charity founded in 1969 focused on providing therapeutic horse-riding, equestrian vaulting and carriage driving lessons to people with developmental and physical disabilities as well seeking to improve the lives of those with mental health difficulties. Princess Anne has been the organisation's President since 1985.
Source: Wikipedia — Riding for the Disabled Association (CC BY-SA 4.0)