All notices or other communications required in connection with this Agreement shall be in writing and sent by hand, by first class pre-paid post or by facsimile transmission to the relevant address or facsimile number set out in the Design Build Finance and Maintain Agreement or in the case of the Independent Tester to its registered office for the attention of the company secretary or to such other address or facsimile number as a party to this Agreement may notify to another party to this Agreement in writing.