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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There are reports that 15 people have been injured in a bus crash in France. The coach was taking a school group to Italy.
Staying dry for most, although some cloud will bubble up during the afternoon with one or two showers possible.
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