What kind of police force ranks are there?

In the UK the police ranks are:

County

Constable, Sergeant, Inspector, Chief Inspector, Superintendent, Chief Superintendent, Assistant Chief Constable, Deputy Chief Constable, Chief Constable

City of London Police

Constable, Sergeant, Inspector, Chief Inspector, Superintendent, Chief Superintendent, Commander, Assistant Commissioner, Commissioner

Metropolitan Police

Constable, Sergeant, Inspector, Chief Inspector, Superintendent, Chief Superintendent, Commander, Deputy Assistant Commissioner, Assistant Commissioner, Deputy Commissioner, Commissioner