People have already started lining up in London to pay their last respects to Queen Elizabeth II when she stays in the state from 5pm UK time on Wednesday 14 September.
Millions are expected to pass by her coffin over the four days it will take place at Westminster Hall near the Houses of Parliament.
Vanessa, one of the people already in line, explains what she was told.
“They said[the line of mourners]might be 7 miles[11.2km]but we don’t know. Yes, I would like to pay my final respects.”
Police said the policing operation will be on a larger scale than ever before. They impose strict restrictions – people can only have one small bag.
Sir Mark Rowley, the new Chief of Police, said it should be a safe event.
Sir Mark said: “We will be putting thousands of police officers into this because of the level of security needed and the millions of people we want to honor.