These implemented the Future Dorset plan to see all councils then existing within the county abolished and replaced by two new unitary authorities on 1 April 2019.

As regards to planning decisions, highways, cleaning, education and social care no confusion remains as to the potentially relevant body (including occasional open conflict of powers/responsibilities) between two tiers of local government (which can be the case where county and district councils co-exist).

Significant saving (economy of scale) follows from one highly skilled and well-remunerated executive and one body of councillors as compared to six each of varying functions.

Co-working measures had long been shown locally to make inroads towards an efficient, combined approach.

All of the unitary authority area retains another tier of local government, by having a civil parish, a late Victorian innovation which has been reduced to a consultative planning and minor amenities role such as co-funding events, festivities, footpaths and sports facilities during the 20th century.