Mostafa Sepahvand, 41, made the statement during questioning on May 15, 2025, as investigators examined his communications with contacts in Iran and his alleged role in gathering information about potential targets.
Prosecutors allege Sepahvand was receiving payments from individuals directing the operation from Iran.
Sepahvand is on trial alongside Farhad Javadi Manesh, 46, and Shapoor Qalehali Khani Noori, 57. All three deny charges under Britain's National Security Act.
Prosecutors allege the men gathered information for Iranian intelligence in preparation for serious violence against at least one target in Britain, with Sepahvand expected to carry out an attack and the other two helping with preparations.
The alleged targets included Iran International journalists Mojtaba Pourmohsen and Kambiz Hosseini.
In an earlier hearing, jurors heard a March 20, 2025, voice recording in which Sepahvand said he had been promised £150,000 and help resolving a criminal case in Iran if he completed the task.
"They have sent me £3,500, and they keep sending me fifty addresses," he said in the recording, complaining about the costs of visiting locations.
During the police interviews that were read out by prosecutors on Wednesday, Sepahvand acknowledged having access to addresses but insisted he had not carried out violence.
"We could hit them. We had the address. But I swear to the God who is up there we did not do anything," he told investigators.
The addresses discussed in the case were not limited to locations associated with Iran International journalists.
Sepahvand repeatedly maintained that he had been threatened and pressured by people he linked to the Iranian government, while denying carrying out the actions demanded of him.
"They put pressure on me to do something. They threatened me but I did not do it. I didn't do it," he said.
Asked about photographs relating to Iran International journalists, Sepahvand told investigators: "There are only those pictures and I haven't done anything."
"They came to say do it, do it with your friends. I swear to God we didn't."
The questioning also examined Sepahvand's communications with Mostafa Ghorbani, including messages about addresses, payments and assurances concerning his legal difficulties in Iran.
In one exchange dated February 24, 2025, Ghorbani relayed a message from a contact named Amin saying certain addresses should not have been sent.
Sepahvand declined to comment when questioned about that exchange.
The court also examined transcripts of police interviews with Manesh, who denied gathering intelligence on Iran International or receiving instructions to target its journalists.
During an interview on May 3, 2025, Manesh acknowledged that he might have walked or driven past the broadcaster's offices and taken photographs, but said he could not remember the details.
He described the building as beautiful and said he had been curious about it. He also told investigators he had visited a nearby car wash to obtain medication for a sore throat.
"Not at all," Manesh replied when asked whether he had targeted Iran International journalists.
Investigators subsequently questioned him about a photograph of Iran International presenter Kambiz Hosseini sent to him by Sepahvand on December 24, 2024.
Manesh denied knowing Hosseini's name, despite police pointing out that the photograph displayed both the journalist's name and Iran International's branding.
He said he had been curious about whether the person pictured was a journalist who had been beaten up.
Police also asked about an Instagram link concerning Hosseini's program and Manesh's English response of "good good" to a link sent by Sepahvand.
Manesh said the expression was a catchphrase he had picked up from a YouTuber known as AB and that it meant "I don't care."
He maintained that the phrase carried no particular meaning.
Asked about Sepahvand's subsequent message, "This is it bro," Manesh said he was unsure what it meant but suggested it might refer to the reporter he believed had been beaten up.
Manesh described his relationship with Sepahvand as a casual friendship, saying the two spoke approximately every other day, often discussing cars and health matters.
He said Sepahvand had lent him money in amounts not exceeding £300 and denied that Sepahvand knew people who could threaten him or his family.
According to the prosecution's account of their defenses, Sepahvand accepts conducting surveillance for Iran but says he feared the consequences of refusing and deliberately did a poor job. Prosecutors reject that explanation.
Manesh and Noori acknowledge visiting locations and taking photographs and videos but maintain they did not know they were assisting Iranian intelligence.
The trial is scheduled to resume Thursday at 10:30 a.m.