Officers from police forces around the country will gather at the National Memorial Arboretum in Staffordshire today to remember colleagues who fell in the line of duty.
They will be joined by cyclists who have biked from London to the Arboretum over the weekend - raising thousands for bereaved force families.
Every cyclist is wearing a wristband with the name of the officer they are remembering.
Around 500 relatives of police officers killed in the line of duty, colleagues and representatives from forces across the UK will gather for the event where the Roll of Honour of those who have died on duty over the last 12 months will be read out.
The Service of Remembrance is a chance for us all to remember those no longer with us - and also to celebrate the memories we have of them. It is a culmination to a weekend of 'healing, love and life renewed' and is all part of the COPS mission - to help rebuild shattered lives.
Riders from 21 police forces across the UK set off from New Scotland Yard on Friday for the 190 mile journey to the Arboretum.
The first ride raising money for families of the fallen was in 2013, with 25 riders. This year nearly 100 set off from London.
They're hoping to raise £60,000.