The Fitch ratings agency has placed the UK on a negative ratings watch, causing sterling to fall sharply.
A "negative ratings watch" means that the country is on review for a potential credit downgrade.
More top news
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.
Lottie and her dog Marley confronted a man who had taken a laptop and goods from a Lush store in Oxford.