8In this Schedule—
" building " includes part of a building ;
" owner ", in relation to a building, means the person entitled to possession of the building ; and
" relevant lands and heritages " and " relevant period of vacancy " have the same meanings as in section 24 of this Act,
and references to a newly erected building include references to a building produced by the structural alteration of a building included in relevant lands and heritages which by virtue of paragraph 5 of this Schedule have ceased or will cease to exist on the completion of the structural alteration and, in relation to a building so produced, references to erection of a building shall be construed as references to the structural alteration producing it.