Almost 2000 off-duty police officers from across the Midlands will march in London today.
They want to highlight the impact of the cuts to policing and the effect it will have on public safety.
The demonstration is also about the dangers of the mass privatisation of policing, police officers pay, pensions and conditions of service.
The march will begin at Millbank at 12pm and will conclude at Waterloo Place.
A group of officers will also lay a wreath at the Memorial in Pall Mall at the end of the march, as a mark of respect to fallen officers.
Chairman of Derbyshire Police Federation, Mark Pickard, who represents the county's constables, sergeants, inspectors and chief inspectors, said: