Clive Chamberlain from Dorset Police Federation is among those taking part in the march. Officers from every police force in the country are taking part in the protest in London.
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Six of the small marsupials have been born in the 180-year-old Zoo’s Twilight World and keepers say they are thrilled.
A cloudy night will have drizzly spells throughout and into the early hours.
It will be a largely cloudy night with outbreaks of light rain. There will also be some hill fog.