The UK faces a credit rating downgrade because of the mounting risk that it will leave the EU without a transition deal, according to rating agency Fitch.

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The merger between Sainsbury’s and Asda has been thrown into serious doubt after Britain’s competition watchdog the CMA raised a catalogue of concerns, including higher prices and reduced quality and choice for consumers.

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UBS has been ordered to pay €4.5bn (£3.9bn) by a French court for helping wealthy clients dodge tax, adding to a raft of violations that stand to leave the Swiss bank almost £8bn out of pocket.