One of its key roles was to implement government policies aimed at preventing - or managing - outbreaks of serious animal diseases, and in doing so support the farming industry, protect the welfare of farmed animals and safeguard public health from animal borne disease.
In England and Wales it also worked to protect public health by ensuring that dairy hygiene and egg production standards were met.
It also regulated the trade in endangered species through CITES.
Previously Animal Health was known as State Veterinary Service.
The Scottish arm of the organisation was a member of SEARS (Scotland's Environmental and Rural Services).