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 man (87) and woman (78) were trapped off the A46 in Gloucestershire overnight - the car was eventually spotted by a passing driver.
The Food Connections festival highlights the work of people who have given up the day-job to do something they really love.
The RAC says a "far greater" number of cars will be out on the roads compared to 2015, and are warning of three West Country "blackspots"