Put simply, trade is the economic mechanism that involves the transfer of goods or services from one person or entity to another.

Trade has been one of the key issues throughout the Brexit process, both in the pre-referendum debate and during the subsequent withdrawal negotiations.

Global geopolitics and everyday business practicalities all impact on how trade is carried out between nations and specific markets, and the impact of Brexit on both the UK and European economies remains to be seen.

In order to shed a light on the complexities of trade we asked Andrew Lang, Professor of Law and Chair in International Law and Global Governance at the University of Edinburgh, to explain how Brexit may affect different sectors and analyse the legal implications.