Here is the third part of John Christensen's talk in Stroud which I've put together with a friend.
See 'Tax Havens part 1: Alternative to the Cuts' at:
See 'Tax Havens part 2: Britain is the Biggest Player: How Bananas Help Us Understand Tax Havens' at:
See report of talk here. Part 4 looks a bit at the history and the solutions and should be ready later today.