Without a new deal, the UK will trade with the EU under World Trade Organisation rules, meaning tariffs would be in place.
The legal relationship with the EU will remain the same for the next two years once the decision following the UK referendum to leave the European Union is formally acted on by the UK government.
The HTA said issues raised post Brexit are:
- The potential impact of tariffs, customs charges and rules of origin declarations on EU trade
- The potential impact of non-tariff barriers to service trade with the EU
- Trade outside the EU in countries with which the EU has trade deals
- Current regulations and standards influenced by the EU which may now be renegotiated
- Upcoming European legislation, its application in the UK and the significance Brussels may have going forward
- Disruption to EU programmes and funding
- The future of migration, including current EU residents and future immigration policy
- Potential for further devolution in the UK
- Investment decisions, contracts and licenses that refer to EU legislation.