3(1)The Secretary of State may under section 2 of this Act acquire so much of the subsoil and under-surface of land as is required as mentioned in that section without being required to acquire any interest in any other part of it.E+W
(2)In the case of any land identified on the deposited plans by a number followed by the suffix “u”, the Secretary of State shall not acquire compulsorily under section 2 of this Act any interest except the subsoil or under-surface or any easement or right in that subsoil or under-surface.
(3)For the purposes of sub-paragraph (2) above the subsoil and under-surface of any land shall not include any subsoil or under-surface which is 2 metres or less—
(a)where there is a building on the land, below the level of the surface of the ground adjoining the building;
(b)where there is a watercourse or other area of water, below the level of the surface of the adjoining ground which is at all times above water level; or
(c)in any other case, below the level of the surface of the ground.