David Cameron, yesterday:

But it's not right if you have businesses instead of paying some taxes somewhere are paying no taxes anywhere. And the G8 — when the world's most powerful and important countries come together — I think can help to crack that problem.

Now deliver, please.

Start with country-by-country reporting.

Then automatic information exchange.

Then redefining corporate residence.

That will do for now. But I could add to the list......