The Governor of the Bank of England warned that any recovery would be slow and that the crisis in the eurozone had cast a "black cloud of uncertainty" over businesses around the world.
"I think it's this black cloud of uncertainty which is hanging over British business as it is hanging over American business."
The European Central Bank's actions to support the currency had bought some breathing space, Sir Mervyn said in an interview with Channel 4 news.
"Now is the time that they have to decide exactly what kind of monetary union they want."
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Police said the child, who was without a driving licence, was trying to make his way 2,500 miles from the east coast to Perth.
The 24-year-old was charged with 14 counts of wounding with intent to do grievous bodily harm and one count of throwing a corrosive fluid.
Winds will veer northerly overnight with colder air streaming in over the next few days.