A young girl who died in unexplained circumstances in south London was a popular child who "was always giggling away about something".
A 33-year-old man has been arrested over the death of six-year-old Ellie Butler.
Ellie collapsed in her home in Sutton, south London, on Monday afternoon. Paramedics treated her at the scene but she was pronounced dead at hospital.
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The action comes as a commuters' group goes to court to seek a judicial review of the franchise.
Michael Bond, the creator of Paddington Bear has died at the age of 91.
Rumours on social media prompted the IPCC to take the highly unusual step of releasing details of the preliminary post-mortem examination.