Real Property Act 1900

In every instrument, transferring an estate or interest in land under the provisions of this Act, subject to mortgage, charge or covenant charge, there shall be implied the following covenant by the transferee, that is to say, that such transferee will pay the interest, or annuity, or rent-charge secured by such mortgage, charge or covenant charge after the rate and at the times specified in the instrument creating the same (or, in the case of a covenant charge, any interest payable in accordance with the terms of the judgment to which the covenant charge relates), and will indemnify and keep harmless the transferor from and against the principal sum secured by the mortgage, charge or covenant charge, and from and against all liability in respect of any of the covenants contained in the mortgage or charge, or by this Act implied on the part of the transferor.