The Independent had this from Ken Livingstone:

Ronald Reagan and Margaret Thatcher dismantled the financial regulatory system that had given us a generation of stability, and the chickens are now coming home to roost. No one is better placed on the international scene than Brown to create a modern version of that regulatory system. Even George W Bush is angry at the use of international tax havens by American corporations to avoid paying tax. Now is the time for Britain and Europe to put in place new checks that can squeeze them out of existence. Coupled with a return to a progressive tax policy this could be the package that delivers Labour a fourth term.

Ken may be history (but I wouldn't be sure) and he's certainly not mainstream, but he's probably right about this.

This is the combination of a massively popular, and appropriate, policy.

But will he do it?