Execution under power of attorney
45.—(1)  The donee of a power of attorney may, if he thinks fit, execute or do any assurance, instrument or thing in and with his own name and signature and his own seal, where sealing is required, by the authority of the donor of the power.
(2)  Every assurance, instrument and thing so executed and done shall be as effectual in law, to all intents, as if it had been executed or done by the donee of the power in the name and with the signature and seal of the donor thereof.
(3)  This section shall apply to powers of attorney created by instruments executed before, on or after 1 August 1886.