METLEN ENERGY & METALS S.A. MYTILINEOS HOLDINGS S.A. - ANNOUNCEMENT OF THE SUMMARY DRAFT MERGER AGREEMENT ANNOUNCEMENT OF THE SUMMARY DRAFT MERGER AGREEMENT REGARDING THE MERGER BY ABSORPTION OF THE SOCIETE ANONYME UNDER THE BUSINESS NAME "THORIKI - PRODUCTION AND TRADE OF METALS INDUSTRIAL SOCIETE ANONYME" WITH THE SOCIETE ANONYME UNDER THE BUSINESS NAME "MYTILINEOS HOLDINGS SOCIETE ANONYME"