18.—(1) Where an executor who has renounced probate has been permitted, whether before or after the commencement of this Act, to withdraw the renunciation and prove the will, the probate shall take effect and be deemed always to have taken effect without prejudice to the previous acts and dealings of and notices to any other personal representative who has previously taken out representation, and a memorandum of the subsequent probate shall be endorsed on the original grant.

(2) This section applies whether the testator died before or after the commencement of this Act.