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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A print of a girl holding a balloon by Bristol artist Banksy has sold for £56,250 - twice the expected price and more than a Picasso.
There will be plenty of sunny intervals this morning but expect light rain and a chilly breeze this afternoon.
A food sculptor and cheese fanatic from Gloucestershire has created a BRIE-lliant Nativity scene made entirely from local cheddar.