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
A British scientist says the age women may be able to conceive children could soon be significantly extended.
Simon Cowell admitted he was "so embarrassed" after his shirt burst open during an X Factor audition.
Following the promise of further powers for Scotland, David Cameron is now talking about a new deal for the other home nations.