City of London Police say anyone with information should call 020 7601 2222, or Crimestoppers, anonymously, on 0800 555 111.
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The nursery where toddler Tiya Chauhan died after choking on a piece of jelly has pleaded guilty to breaking health and safety regulations.
The vast gaps in the finance sector and the discrimination faced by Black and Ethnic Minority women make the city one of the UK's worst.
The elderly man has been remanded in custody after being charged with attempted murder.