The BBC show follows a personal protection officer who is assigned to protect an ambitious home secretary, played by Keeley Hawes.
Counterterror police are hoping that popular drama Bodyguard will inspire a new generation of recruits – but warn that the thriller diverges from the reality of life as an officer.
Mr Ray said that large teams worked to protect key figures, unlike the fictional David Rudd, the lone officer played by Richard Madden, who protects the Home Secretary in Bodyguard.
A record audience is expected to watch the Bodyguard finale on Sunday and the show will then move to Netflix, through which international audiences can tune in.