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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Celebrations are underway in Bristol as the Old Vic turns 250 years old.
Police say cyber crime in Avon and Somerset is almost doubling every year in the force area.
A postman is walking one of the earliest postal routes to celebrate 500 years of Royal Mail & raise money for charity.