Lend Lease is believed to be considering a merger with its listed General Property Trust to form a group worth about $11 billion after Westfield Holdings made a similar move last week. Property analysts said Lend Lease was under increasing pressure to follow the lead of its competitors, adding that stapling its shares and units would reduce fees and remove a layer of management. Such a move would also give Lend Lease extra capacity to tap into global development projects in the same way as its major competitors, Multiplex and Westfield.