Unitary authority
Larger than a normal Local Authority - created by combining local authorities between 2001 and 2011
Non-met district
Normal local authority, not heavily urbanised and less infrastructure for public transport
Metropolitan borough in england
A more heavily urbanised Loca Authority with good provision of public transport infrastructure
London borough
A local authority in Greater London - tends to share features with Metropolitan boroughs
Unitary authorities in Wales
All local authorities in wales fall into this, regardless of difference in size.