Where a landlord of a holding, in pursuance of a provision in that behalf contained in the lease, resumes possession of any part of the holding without giving notice of his intention so to do, the provisions of paragraphs (b) and (c) (exclusive of the proviso thereto) of section thirty of the principal Act shall apply in like manner as if notice to quit had been given under the said section with regard to the part of the holding so resumed, provided that in assessing the compensation payable to the tenant, and the reduction of rent, any benefit or relief allowed to the tenant under the lease in respect of the resumption shall be taken into consideration.