The owners of European oil giant Perenco have invested billions of euros of offshore money in Europe. While accusations of pollution multiplied against the group, the Perrodo family funnelled over £460 million from tax havens into London real estate and grew an investment portfolio with more than €2 billion of assets in Luxembourg. New analysis by Investigate Europe and Disclose shows the extent of this business empire built on oil profits and relying on tax avoidance.