These pictures show what Andrew Mountbatten-Windsor is likely to have experienced as he was taken into custody in Norfolk.
The former prince was held at the Aylsham Police Investigation Centre for 11 hours on Thursday following his arrest on suspicion of misconduct in public office.
While no details have been given about the exact process he underwent, most people taken into custody are photographed, fingerprinted and swabbed for DNA before being taken to a cell or interview room.
The footage inside the Aylsham centre was filmed by BBC Look East in December 2017 to explain how police handle drink driving suspects but the process is similar for anybody held under arrest.