British Business Secretary Vince Cable has the power to stop pharmaceutical companies in the U.K. from supplying the lethal injection drugs used in American executions. In November, he did just that, restricting the export of sodium thiopental to the U.S., citing the British government's "moral opposition" to capital punishment.

But Cable has ignored the fact that British firms are continuing to sell other lethal injection drugs -- potassium chloride and pancuronium bromide -- to states like California and Arizona desperate for new supplies of killer cocktails since the only U.S. supplier of such drugs has long since run out.

Though British human rights group Reprieve has repeatedly asked Cable to ban the export of such drugs, one of his spokesmen recently told the BBC that he'd received no such formal request. So it seems like Cable needs a reminder: if Britain's opposition to the death penalty is to be more than just rhetorical, he needs to fulfill his moral duty to ensure the U.K. is not complicit in a punishment it claims to oppose.

Ask Secretary Cable to immediately impose a ban on the export of the drugs that are fueling America's death penalty.