Sullivan & Cromwell's London office has sealed its second deal for Rio Tinto in little more than a month, advising on the $2bn (£1.2bn) disposal of four packaging business units of its subsidiary Alcan.

The mining giant is offloading Alcan's tobacco and drugs packaging units as well as its European and Asian food packaging arms to Australian group Amcor.

The deal comes after Sullivan advised on last month's $1.2bn (£731.1m) sale of Alcan's Food Americas division to packaging company Bemis.