Mining Leases Act 1723

Lease by mortgagee void against person having equity of redemption, unless he joins or consents.

VIII. Provided also, That if any mortgagee or mortgagees of any lands or tenements do or shall make such lease or leases as aforesaid, the same shall be void against the person or persons, who shall be intitled to the equity of redemption of the same, unless such person or persons shall join in such lease or leases, or otherwise consent or agree thereto.