Class A - undergoing or in need of structural alteration or major repair (exempt for up to one year).
Class B - Owned by charity (exempt for six months).
Class C - unfurnished (exempt for six months).
Class D - left empty by someone who has been sent to prison
Class E - left empty by someone who is receiving care in hospital, residential home or elsewhere.
Class F - waiting for probate or letters of administration to be granted (and for up to six months afterwards).
Class G - empty because occupation is prohibited by law.
Class H - waiting to be occupied by a Minister of Religion.
Class I - left empty by someone who is receiving personal care elsewhere.
Class J - left empty by someone who is caring for another person.
Class K - left empty by a student.
Class L - repossessed by the mortgagee.
Class M - Halls of Residence occupied only by students.
Class N - occupied only by students.
Class O - owned by the Secretary of State for Armed Forces Accommodation.
Class P - where the liable person is a member of Visiting Forces.
Class Q - the responsibility of a bankrupt's trustee.
Class R - empty caravan pitches or boat moorings.
Class S - occupied only by persons under 18.
Class T - empty granny annexes which may not be let separately.
Class U - occupied solely by persons who are severely mentally impaired.
Class V - main UK dwelling of a visiting diplomat.
Class W - annexe or self contained unit occupied by a dependant relative of a person who is resident in that property.