Five years ago the life of Eastenders actress Brooke Kinsella was torn apart when her 16-year-old brother Ben was killed in a knife attack after a night out in north London.
Today, after years of campaigning on knife crime issues, Brooke has been named as a new ambassador for the charity Victim Support.
Brooke and Javed Khan, chief executive officer of Victim Support, joined Nina in the studio.
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The capital's theatres also generate more searches than those in any other city, according to research by Google.
Union officials are expected to meet next week to plan further stoppages if talks fail to resolve the dispute.
Natalie Sharp and Christine Bicknell appeared in court over an alleged incident at a Lidl superstore in Wallington, south London.