Trade
Jobs
Costs of EU membership Are the benefits of "EU membership" really greater than the costs?  Is water wet?
National Security Defence and military matters
Crime and Policing
Health
Movement of people Travel. Owning overseas property.
Political influence
UK Political Parties
Unelected Special Interest Groups Outside influence from those with their own agenda.
EU Rules EU laws and Treaties that control the lives of every UK citizen and those it permit to live in the UK.
EU Expansion How the EU will increase in size and UK influence will reduce in proportion.