The Trent Accreditation Scheme (TAS), now replaced de facto by a number of independent accreditation schemes, such as the QHA Trent Accreditation, was a British accreditation scheme formed with a mission to maintain and continually evaluate standards of quality, especially in health care delivery, through the surveying and accreditation of health care organisations, especially hospitals and clinics, both in the UK and elsewhere in the world. The Trent UK Accreditation Scheme, or TAS UK, ceased to operate in May 2010, when a majority of Board members decided to end the scheme.