Nick Clegg's comments that the Coalition had made a mistake by not spending enough on infrastructure came ahead of the latest growth figures, which will be announced today.
He said the figures will reveal what happened in the last three months of 2012 are likely to be "considerably weaker" than over the summer.
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Armed police have taken part in a dramatic training exercise aimed at recreating the chaos of a Paris-style terror attack.
After a remarkably mild November - a notable mild start to the new month.
The Facebook founder revealed the plan as he and wife Priscilla Chan announced the birth of their baby daughter, Max.