Oddly, this latter figure, in dollar terms, is very similar to the one approved by Congress - a little over $692 billion at today's retail conversion rates (and even closer in wholesale terms).
But the really interesting thing is the difference is in its relationship to the size of the population of the country, and the GDP:
Marc Faber recently said that the US needed $5 trillion to resolve the crisis, i.e. 7 times more than the amount approved by Congress. Britain's bailout fund is proportionately 7 times greater, and so, crippling cost to the taxpayer aside, maybe it could work.
And it has political implications. The average Brit is so innumerate that he doesn't know how to calculate 75% of 100, so don't expect him to understand that it wasn't simply "the banks" to blame, but the relaxation of Government monetary controls. Don't discount the possibility that, however undeservedly, Gordon Brown may win the next election.