I find this topic confusing, because there are so many figures out there from seemingly credible sources. You hear politicians using figures to either attack current policy or defend it. Many people disagree with the governments own figures.
So I would like to know, without any of the politics, what is the actual, or closest to actual figure of how much money is lost through corporate tax evasion and avoidance in the UK?
Please cite sources and if you can; reasons why the figure you provide is correct or as close to correct as possible.