A man accused of being part of a UK terror cell told police he helped make and blow up a fertiliser bomb on a training session, a jury has been told.
Seven men all deny plotting to cause explosions
In a video-taped interview shown to the jury, Salahuddin Amin, 31, said he and co-accused Omar Khyam went on a two-day training course in Pakistan in 2003.
Mr Amin admitted getting "mixed up with terrorists", but told police he did not consider himself to be a terrorist.
He and six other men deny conspiring with a Canadian to cause explosions.
Mr Amin said in his first police interview, which was played to the Old Bailey jury: "I knew I was involved with terrorism at that time but I regret whatever I have done."
The interview took place eight hours after Mr Amin was arrested on a British Airways flight from Islamabad as it arrived at Heathrow airport on 8 February last year.
Mr Amin said he and 24-year-old Mr Khyam had received instruction on how to make an ammonium nitrate fertiliser bomb while at a house in Kohat, Pakistan, in 2003.
He went on to say they had detonated a "fertiliser explosive" in a nearby river, the Old Bailey heard.
Mr Amin also told police he knew Mr Khyam wanted to carry out explosions in the UK, but added he did not know exactly what his intention was, the Old Bailey heard.
In the first hour of the interview, Mr Amin said he had also been shown how to make the poison ricin, and that he had manufactured it but never used it.
He said in the interview he had got "mixed up" with extremists in the UK before travelling to Pakistan, the court heard.
"They showed me some videos and they brainwashed me," he said.
Mr Amin insisted that his time in house in Kohat in 2003 was "the only training I have ever done", the jury heard.
In the interview, he said he had made notes but later had to burn them and remembered "nothing whatsoever about" the training.
Mr Amin also allegedly became involved in providing money to back the fight against coalition soldiers in Afghanistan, the jury heard.
The defendants were arrested on 30 March, 2004, after fertiliser was found stored in a west London depot.
Mr Amin of Luton, Bedfordshire, Anthony Garcia, 23, of Ilford, east London, Nabeel Hussain, 21, of Horley, Surrey, Jawad Akbar, 22, Omar Khyam and his brother Shujah Mahmood, 19, and Waheed Mahmood, 34, of Crawley, are all accused of conspiring to cause explosions likely to endanger life between 1 January, 2003 and 31 March, 2004.
Mr Khyam, Mr Garcia and Mr Hussain also deny a charge under the Terrorism Act of possessing 600kg (1,300lb) of ammonium nitrate fertiliser for terrorism.
Mr Khyam and Shujah Mahmood further deny possessing aluminium powder for terrorism.