A constable was a police officer.
A notice board in front of a police station had a poster that said "WE'RE LOOKING FOR SOME EXTRA SPECIAL CONSTABLES". (TV: Rose)
The day after the assassination of John F. Kennedy, constable Reg Cranfield saw his late father in the mists along Totter's Lane. (PROSE: Shroud of Sorrow)
In November of 1963, Constable Oswald had filled out the missing person report for Susan Foreman. (PROSE: Susan's Diary)
Groom was a constable in Devil's End. (TV: The Dæmons)
Constable Zreeg was one of the Wrarth Warriors that went to Earth around 1980 in pursuit of Beep the Meep. (COMIC: Doctor Who and the Star Beast)
Before she joined Torchwood Three, Gwen Cooper was a constable. Andy Davidson was also a constable. (TV: Everything Changes)
After the Space-Time Manipulator sent Jorjie to 1963, he was found by a constable. (TV: The Cambridge Spy)
Nicki Owen was a constable in the 2010s. (AUDIO: The Empty Hand)
Yasmin Khan was also a constable. (TV: The Woman Who Fell To Earth)
Constable Pavo was a member of Chapter 9, the Time Lord police force. (AUDIO: The Black Hole)