What was the main platform of leave? What was the overwhelming message from leave?
Job security? Better quality of life?
There were a number, in random order.
Control of borders: The free movement of people meant that Britain couldn't control the large numbers of EU nationals coming to settle in the UK.
Democracy: The EU is hugely undemocratic, with very poor mechanisms of accountability and repeal of legislation.
Trade barriers: Being part of the EU meant that the UK couldn't conduct its own trade deals.
EU Law taking paramouncy over UK law: A bugbear for a lot of conservatives who find that the traditional common law method was superior to the civil law method.