How cyber security firm Darktrace was set up by former members of the UK security services and maths professors.
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Business Blog
Cathy Chamberlain is bringing curvy caravans back in fashion.
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The UK government says Scottish limited partnerships have been exploited in complex "dirty money" schemes.
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A trade in false online reviews relied upon by millions is identified in a BBC investigation.
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Talks to combine the two British supermarket chains are at an "advanced" stage, Sainsbury's says.
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BBC business correspondent Emma Simpson looks at the latest merger shaking up the grocery sector.
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