It is thought the decision to fly separately provoked a security nightmare for the protection officers.
He had met the Prime Minister's senior protection officer twice before.
People who want time to think can go there without their protection officers in the knowledge that they will be safe and completely undisturbed.
A lot of fuss that was over security, but he did leave his protection officers behind him.
It can happen, though most experienced protection officers guard against that.
He worked as an education inspector, lecturer and environmental protection officer before going into politics in 1998.
A 52-year-old woman, believed to be a royal protection officer, was arrested in Essex.
Close protection officers also learn how to escort a client in potentially threatening situations.
The log is filled in every day by protection officers detailing their duties.
And royal protection officers would not have allowed Diana to be a passenger in a car driven by someone who had been drinking.