5(1)A building is an agricultural building if—
(a)it is used for the keeping or breeding of livestock, or
(b)it is not a dwelling, it is occupied together with a building or buildings falling within paragraph (a) above, and it is used in connection with the operations carried on in that building or those buildings.
(2)Sub-paragraph (1)(a) above does not apply unless—
(a)the building is solely used as there mentioned, or
(b)the building is occupied together with agricultural land and used also in connection with agricultural operations on that land, and that other use together with the use mentioned in sub-paragraph (1)(a) is its sole use.
(3)Sub-paragraph (1)(b) above does not apply unless—
(a)the building is solely used as there mentioned, or
(b)the building is occupied also together with agricultural land and used also in connection with agricultural operations on that land, and that other use together with the use mentioned in sub-paragraph (1)(b) is its sole use.
(4)A building (the building in question) is not an agricultural building by virtue of this paragraph unless it is surrounded by or contiguous to an area of agricultural land which amounts to not less than 2 hectares.
(5)In deciding for the purposes of sub-paragraph (4) above whether an area is agricultural land and what is its size, the following shall be disregarded—
(a)any road, watercourse or railway (which here includes the former site of a railway from which railway lines have been removed);
(b)any agricultural building other than the building in question;
(c)any building occupied together with the building in question.