With that kind of turnover you have two options:
1) Continue to live in the UK and create an international company structure. There are multiple ways to do this and to reduce your taxes legally, but don´t be too smart. With this option you will have to keep a substancial income in the UK, or else you︀ will have nothing to spend on homes and cars.
2) Move your residency to a︁ more favorable country/jurisdiction. With this option you should be able to get your payable tax︂ really low depending on the jurisdiction and setup that you choose.
A more spesific answer︃ would require a more thorough information on your spesific situation and needs.