UBS has agreed to pay £940 million in penalties to settle the Libor interest rate manipulation case.
The penalty was agreed with US, UK and Swiss regulators.
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The Orkney Islands took second place, followed by Rutland and Wychavon while last year's winner Winchester falls to fifth place.
The prime minister reached a compromise deal within Tory ranks in a bid to prevent a revolt over plans to write the Brexit date in law.
Freezing, frosty and icy again tonight as temperatures fall.