There was a book about this called "The Last Ditch", about the "British Resistance Movement" and the "stay-behind squads" tasked with sabotage and eliminating collaborators. Brig. Colin Gubbins was the OC. of the organization.
The tactic works if carried out ruthlessly. Poland was a unique example: there was no collaborationist government in Poland because collaborators were swiftly eliminated by the Home Army and other resistance movements.
On the other hand, Capt. Burgoyne may have felt the need for some protection as the article alluded.
Now, was she related the ill-starred general of Brandywine fame?