I calculated yesterday that Jersey cost the UK at least £500 million a year in lost tax revenue. I had only read the summary report issued by Jersey at the time.

Now I have read more of the main report. And note they agree that the tax loss caused by Jersey is £500 million a year - page 62.

I did my calculation in a few minutes. Jersey, no doubt spent a fortune on the exercise.

My figure is a minimum, and a generous one at that since it ignores tax evasion on capital sums shifted to Jersey which could be a massive issue, and capital gains and inheritance tax. There's, they say, is a maximum.

But let's not quibble. The fact is, as I argued yesterday, that is a tax loss bigger than the saving from the Bedroom Tax. And that is a real measure of the harm Jersey inflicts on the people of the UK.

I and the Tax Justice Network have always argued tax havens aid and abet the creation fo poverty. Now we know it is true.