PC Marc Horsewood from Lincolnshire Police speaks to ITV News about the importance of the march in London.
He is just one of up to 20,000 police officers from forces across England and Wales travelling to London today.
This is the first police march in the capital for more than four years.
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A Leicester City fan who put a £5 bet on a 5000-1 that his team would win the Premier League could find himself £25,000 richer.
He will be replaced by Academy Director and former Rams defender Darren Wassall until the end of the season.
The boy, 7 and girl, 4, were pulled from the rubble by the fire service and airlifted to Birmingham Children's hospital.