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.
More top news
Largely dry with some occasional sunshine this afternoon.
A 16-year-old schoolgirl, whose mum died of breast cancer, has raised £2,750 for the charity Hospiscare to thank them for their support.
Although the crime total has dropped by almost a third, high value farm equipment is still top of the thieves lists.