ITV News understands that Hans Rausing, an heir to the Tetra Pak drinks carton empire, has been arrested in connection with his wife's death after her body was found at their London home.
Daybreak's Nick Dixon reports.
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ITV News Economics Editor Noreena Hertz said an economic slowdown looms as a fall in retail spending led to gloomy figures.
Detectives in Westminster are investigating after the man was discovered on the Route 189 bus in Marylebone shortly after midnight.
The murderer was shaking and appeared to be gasping for air for around 13 minutes before dying.