4(1)Where mines or minerals underlying any part of a relevant undertaker’s undertaking are situated so as, on two or more sides of that land, to extend beyond the land on which that part of the undertaking is situated, the relevant undertaker shall from time to time pay to the owner of the mines or minerals (in addition to any compensation under paragraph 2 above) any expenses and losses incurred by him in consequence of—E+W
(a)the severance by the undertaking of the land lying over the mines;
(b)the interruption of continuous working of the mines in consequence of paragraph 2(3) above;
(c)the mines being so worked in accordance with restrictions imposed by virtue of this Act or any order made under this Act,
and shall pay for any minerals not purchased by the relevant undertaker which cannot be got or won by reason of the part of the undertaking in question being situated where it is or by reason of the requirement to avoid damage to any part of the relevant undertaker’s undertaking.
(2)Any dispute as to whether any sum should be paid under this paragraph or as to the amount payable shall be referred to the arbitration of a single arbitrator appointed by agreement between the relevant undertaker and the owner of the mines or minerals or, in default of agreement, by the Secretary of State.