Original: 1972 c. 70 Its pattern of two-tier metropolitan and non-metropolitan county and district councils remains in use today in large parts of England , although the metropolitan county councils were abolished in 1986 and they were replaced with unitary authorities in many areas in the 1990s .
Simplified: 1972 c. 70 Its pattern of two-tier councils remains in use today in large parts of England , although the metropolitan county councils were abolished in 1986 and it was replaced with unitary authorities in many areas in the 1990s .