They are accused of taking their lead from copies of the al-Qaeda magazine 'Inspire' which contains blueprints for home-grown attacks.
The device was to have been detonated in Luton as part of a campaign of terror attacks in Britain, authorities here said, adding the plot was foiled in a huge surveillance operation.
At one stage, undercover police looked on as terrorist suspects apparently used the mountains of Snowdonia as a training ground, the Mail Online reported.
The alleged complex 16-month plot emerged as four British Muslim men appeared in court yesterday charged with a raft of terrorist offences.
Zahid Iqbal, 30, is accused of leading a terror network under the instruction of shadowy al-Qaeda masterminds in Pakistan. He was joined in the dock by close friends Mohammed Sharfaraz Ahmed, 24, Umar Arshad, 23, and Syed Farhan Hussain, 21.
According to the report, the gang are accused of working to recruit others to fight Jihad and raising vital funds. They were arrested at their homes in Luton last week after a multi-million pound investigation that began last year.
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Westminster Magistrates' Court heard the men bought survival equipment, downloaded al-Qaeda terror manuals and discussed methods and targets, the report said.
Ahmed is accused of acting as a recruiter and making an 'explorative visit' to Pakistan where he may have undertaken terrorist activities. Hussain is alleged to have been the quartermaster who specialised in the distribution of funds and provisions.
Arshad's role was allegedly to provide practical guidance on activities abroad, what to wear to fit in and to lead the outdoor training, it said. PTI DDC AKJ
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