South Gloucestershire is a Unitary authority in South West England. It is a created region of the UK, after the County of Avon was split up and abolished. It took on its title for historic reasons, but it is a single tier 'county' (Thus a Unitary Authority), it has no connection to the separate local government area of the County of Gloucestershire, rather it works closely with the other Unitary Authorities who took over when the County of Avon was abolished.