Taxing Questions

After a series of controversies over the tax bills of multinationals such as Google and Starbucks, ministers have been talking tough about avoidance. But as new tax rules come into operation, Fran Abrams looks at the reality behind the rhetoric. Will these new regulations halt the decline in corporate tax revenues? And why were so many major companies involved in writing them - even as their own tax affairs were coming under scrutiny? Producer: Rob Cave.