Prime Minister David Cameron said news that the Duchess of Cambridge had gone into labour was "very exciting".
Mr Cameron said, "Best wishes to them. A very exciting occasion and the whole country is excited with them. So, everyone's hoping for the best."
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Shadow chancellor John McDonnell has backed a free vote for MPs on the issue.
Savers into the new scheme can expect rates as high as 4 per cent from some banks.
Very windy with gales possible