In this video grab taken from footage broadcast by the UK Parliamentary Recording Unit (PRU) via the Parliament TV website on April 28, 2026, former FCDO permanent under-secretary Philip Barton answers questions to the Foreign Affairs Committee at Portcullis House in Westminster, central London, as part of the investigation looking into the vetting process over Peter Mandelson's appointment in 2024 as UK ambassador to the US. (Photo by Handout / PRU / AFP via Getty Images) / RESTRICTED TO EDITORIAL USE - NO USE FOR ENTERTAINMENT, SATIRICAL, ADVERTISING PURPOSES - MANDATORY CREDIT "AFP PHOTO / PRU"

In this video grab taken from footage broadcast by the UK Parliamentary Recording Unit (PRU) via the Parliament TV website on April 28, 2026, former FCDO permanent under-secretary Philip Barton answers questions to the Foreign Affairs Committee at Portcullis House in Westminster, central London, as part of the investigation looking into the vetting process over Peter Mandelson's appointment in 2024 as UK ambassador to the US. (Photo by Handout / PRU / AFP via Getty Images) / RESTRICTED TO EDITORIAL USE - NO USE FOR ENTERTAINMENT, SATIRICAL, ADVERTISING PURPOSES - MANDATORY CREDIT "AFP PHOTO / PRU"

Two defendants in handcuffs are escorted to the courtroom by justice officers as a trial starts at court in Wiener Neustadt, Austria, on April 28, 2026, over a plot to attack a Taylor Swift concert in Vienna. The main suspect, who has been in detention since his arrest in August 2024, is facing terror offenses and other charges, prosecutors said. (Photo by ROLAND SCHLAGER / APA / AFP via Getty Images) / Austria OUT

A defendant in handcuffs is escorted to the courtroom by justice officers as a trial starts at court in Wiener Neustadt, Austria, on April 28, 2026, over a plot to attack a Taylor Swift concert in Vienna. The main suspect, who has been in detention since his arrest in August 2024, is facing terror offenses and other charges, prosecutors said. (Photo by ROLAND SCHLAGER / APA / AFP via Getty Images) / Austria OUT

A defendant in handcuffs is escorted to the courtroom by justice officers as a trial starts at court in Wiener Neustadt, Austria, on April 28, 2026, over a plot to attack a Taylor Swift concert in Vienna. The main suspect, who has been in detention since his arrest in August 2024, is facing terror offenses and other charges, prosecutors said. (Photo by ROLAND SCHLAGER / APA / AFP via Getty Images) / Austria OUT

Two defendants in handcuffs are escorted to the courtroom by justice officers as a trial starts at court in Wiener Neustadt, Austria, on April 28, 2026, over a plot to attack a Taylor Swift concert in Vienna. The main suspect, who has been in detention since his arrest in August 2024, is facing terror offenses and other charges, prosecutors said. (Photo by ROLAND SCHLAGER / APA / AFP via Getty Images) / Austria OUT

Two defendants in handcuffs are escorted to the courtroom by justice officers as a trial starts at court in Wiener Neustadt, Austria, on April 28, 2026, over a plot to attack a Taylor Swift concert in Vienna. The main suspect, who has been in detention since his arrest in August 2024, is facing terror offenses and other charges, prosecutors said. (Photo by ROLAND SCHLAGER / APA / AFP via Getty Images) / Austria OUT

Two defendants in handcuffs are escorted to the courtroom by justice officers as a trial starts at court in Wiener Neustadt, Austria, on April 28, 2026, over a plot to attack a Taylor Swift concert in Vienna. The main suspect, who has been in detention since his arrest in August 2024, is facing terror offenses and other charges, prosecutors said. (Photo by ROLAND SCHLAGER / APA / AFP via Getty Images) / Austria OUT