www.shoppingdotcom.co.uk George Bush has pledged to use his presidential veto to block a bill from the US Senate calling for further federal funding for stem cell research.

Last night the upper house voted to lift six-year-old restrictions from the president himself that limit funding for the controversial research.

But, after the 63-34 vote failed to achieve the required two-thirds majority to override a presidential veto, a statement from Mr Bush said: "This bill crosses a moral line that I and many others find troubling.

Exponents of the research say that diseases such as Alzheimer's could be eradicated by stem cell scientists, but critics say that the harvesting of cells from embryos is unethical.

The president has instead given his backing to plans, also approved by the Senate, to fund research where cells are taken from amniotic fluid, placentas and embryos that have died of natural causes.

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