Are you for real?
End to the payment of £350m to the EU (I know the figure is controversial, but the reality is probably higher when you take in to account off balance sheet transfers)
Control of Borders. That includes for immigration policy, extradition policy, security.
Able to set our own trade policy. That's not just trade in goods, but service agreements, new technology, medical development.
The Supreme Court would be the ultimate arbiter and the UK Parliament would be the ultimate law-maker.