In this Part—
" agricultural population " means—
" charity trustees " has the same meaning as in the the Charities Act 2011 ;
" dwelling " means a building or part of a building occupied or intended to be ocupied as a separate dwelling, together with any yard, garden, outhouses and appurtenances belonging to it or usually enjoyed with it;
" house in multiple occupation " means a house which is occupied by persons who do not form a single household, exclusive of any part of the house which is occupied as a separate dwelling by persons who form a single household;
" improvement " includes alteration and enlargement;
" owner ", in relation to a dwelling, means the person who—
and for this purpose " agriculture " includes dairy-farming and poultry-farming and the use of land as grazing, meadow or pasture land, or orchard or osier land or woodland, or for market gardens or nursery grounds;