To stand surety for or to guarantee support or secure the performance of all or any of the obligations of any person, firm or company whether jointly with any other person firm or company and/or severally and whether by personal covenant or by mortgage, charge or lien upon the whole of any part of the undertaking, property and assets of the Company, both present and future, including its uncalled capital or by both such methods; and in particular but without limiting the generality of the foregoing, to guarantee,support or secure whether jointly with any other person firm or company and/or severally and whether by personal covenant or by any such mortgage, charge or lien or by both such methods the performance of all or any of the obligations (including the repayment or payment of the principal and premium of and interest on any securities) of any company which is for the time being the Company's holding company (as such term is defined and used in the Companies Ordinance) or another subsidiary (as defined by the said Ordinance) of any such holding company.