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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Today should be dry with patchy cloud and sunny spells. Winds will continue to ease away through the day.
Fine and dry with some sunshine during the day. Feeling warm with light winds.
Beth Gardiner from Nottingham has become the first person with Down's Syndrome to get a place on a scheme for talented young dancers.