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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It'll be a frosty start to Tuesday morning with showers and hail later, but some sunny spells.
It's going to be a frosty start to Tuesday morning with showers and hail expected later in the day.
Bob Crampton is forecasting a bitterly cold spell on Tuesday - so don't put those wooly jumpers away just yet!