British police have rearrested two men in an alleged Iran-linked plot targeting a U.S.-run air base, underscoring growing concern over foreign intelligence activity while exposing the limits of the evidence so far.

The suspects—a 24-year-old British national and a 25-year-old dual U.K.-Iranian national—were detained under the National Security Act, according to the National Counter Terrorist Policing unit. Authorities suspect they were working for Iran’s intelligence service and were involved in a plan against RAF Fairford, but the investigation has not produced formal charges. ¹

The case has expanded in stages. Five men were initially arrested on Sept. 27 on suspicion of explosives offenses and preparing a terrorist act, while two others were detained in the following weeks. Yet all seven were later released on bail because of a “lack of evidence for formal charges,” the report said. ¹

That contrast defines the story: security officials are treating the suspected plot as serious enough to justify arrests under national-security powers, while prosecutors have not publicly demonstrated evidence sufficient to sustain charges. The rearrests therefore signal continuing concern rather than a completed terrorism case.

The episode also reflects the political sensitivity of RAF Fairford, a U.S.-run facility in Britain, and the broader tension between protecting strategic military sites and preserving due process. The second report similarly described the development as the rearrest of two people in a suspected attack on the air base, but offered no additional evidence or charges. ²

For now, the allegations remain unproven. The investigation is ongoing, and the police action points to an active security inquiry—not a judicial finding that the men plotted an attack.