After retirement Cartland joined his wife Rachel (ex-Hong Kong Civil servant from 1972 to 2006) to form a public sector consulting company.
Cartland was required to retire in the interests of localisation under the compensation scheme which applied to all expatriate non-Chinese officers with similar seniority in the run up to the handover of sovereignty in 1997.
As a friend of the Chair at the end of the Round he helped the then Director General, Peter Sutherland, to bring the negotiations to a conclusion in the areas of Anti-Dumping, Safeguards, Intellectual Property, Government Procurement, as well as Subsidies and Countervail.
He also made a substantial contribution to GATT and WTO Dispute Settlement by chairing the panels in no less than sixteen cases over the twenty years to 2005.
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