British Intelligence Approached Salazar to Purge Axis Spies in Lisbon

By Constance Bell · August 18, 2026

Axis intelligence officers operated within Portugal's colonies and capital while the British Secret Intelligence Service relied on double agents to track them.

Axis intelligence officers operated in the shadow of Lisbon’s embassies, where a single slip by a double agent meant a death sentence. These men lived in the gap between the British Secret Intelligence Service and the precarious neutrality of a dictator.

For the men known only by codenames, the cost of failure was not a diplomatic incident but a firing squad. The file's catalogue entry records the activities of the Abwehr—the German military intelligence service—within Portugal, detailing a landscape of deception where the British relied on a handful of precarious assets to keep the Axis at bay.

Tricycle and Artist

According to the catalogue description for KV 3/170, the British intelligence effort in Portugal leaned heavily on reports from the SIS and a subset of double agents, specifically those codenamed "Tricycle" and "Artist." These men were part of a broader, highly disciplined strategy to flip German assets, a method coordinated by the "Twenty Committee," whose formation and minutes are detailed in related policy files KV 4/65 through KV 4/70.

Double agents are the most endangered men in any war. They operate without the protection of a uniform or the legitimacy of a passport, serving two masters while knowing that only one of them is actually in control. The existence of "Tricycle" and "Artist" suggests that the British had successfully penetrated the Abwehr's Portuguese network, turning German officers into conduits for misinformation. This was the same mechanism that supported Juan Pujol Garcia, the agent codenamed "Garbo" (KV 2/40), who famously deceived the Germans about the location of the D-Day landings. In Lisbon, the stakes were equally high: if the Abwehr discovered the betrayal, the resulting purge would have blinded the British to German movements in the Atlantic.

Pressure on Salazar

While agents worked the streets, the British government worked the palace. The catalogue entry notes a "Link volume" (KV 3/175) containing correspondence regarding approaches made to the Lisbon Government to deal with Axis intelligence officers in Portugal and its colonies.

This puts the British in a delicate position with Dr. António de Oliveira Salazar. The public record identifies Salazar as a dictator who presided over the corporatist Estado Novo, a regime defined by its authoritarian grip and long-term stability. For Salazar, maintaining a facade of neutrality was not a matter of morality, but of survival. He understood that to lean too far toward London was to invite a German invasion, while leaning too far toward Berlin was to risk the Royal Navy cutting off Portugal’s vital colonial lifelines.

The British were not interested in the internal ethics of the Estado Novo; they were interested in the Abwehr. The correspondence in KV 3/175 suggests a transactional relationship where the UK pressured Salazar to purge Axis operatives. It was a cold calculation: the British were willing to overlook the nature of Salazar's dictatorship so long as he could be persuaded to stifle German espionage on the Iberian Peninsula.

Post-War Interrogations

The intelligence war did not end with the surrender of the Third Reich; it merely shifted from the field to the interrogation room. The catalogue description for KV 3/170 specifies that volume five of the file contains post-war interrogation reports of relevant German personnel.

These reports represent the final accounting of the Abwehr's failures in Portugal. They provide the only window into how the Germans perceived the betrayal of their officers and whether they ever realized how deeply "Tricycle" and "Artist" had compromised their operations. The interrogation of these personnel likely sought to map the exact extent of the Axis network in the Portuguese colonies, ensuring that no remnants of the Abwehr's infrastructure remained to serve a future conflict.

The records leave one question unanswered: to what extent did Salazar's government actively assist the British in these purges, and to what extent did they simply allow the SIS to operate as a counterweight to German influence? The catalogue entry confirms the approaches were made, but the final result of those negotiations remains locked in the correspondence of KV 3/175.