The huge gas leak in the North Sea that has now shut down three platforms could take six months to seal.
Gas has been leaking from one of the platforms - owned by Total - since Sunday.
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The group had capsized several times, losing their oars and their global positioning system.
The £15 'liquid biopsy' looks for fragments of genetic material in a tiny drop of saliva.
Figures from the latest ComRes poll shows 58 percent believe David Cameron will not get a good deal for Britain.