DR BILAL ABDULLAH
Iraqi doctor Bilal Talal Samad Abdullah was arrested at Glasgow Airport on 30 June following the failed car bombing.
He has since been charged with conspiracy to cause explosions.
He appeared via video link at the Old Bailey on 5 October and was remanded in custody.
A plea hearing was set for 18 January and a trial is expected to take place next autumn.
Dr Abdullah worked at the Royal Alexandra Hospital in Paisley as a diabetes specialist.
He qualified in Baghdad in 2004 and first registered as a doctor in the UK in 2006.
He was given limited registration by the General Medical Council (GMC) from 5 August 2006 to 11 August 2007.
Limited registration is awarded to recent medical graduates and it allowed him to work in Britain for a year, but in accordance with standard procedure, he could not move jobs during that time and had to be supervised.
He lives in Neuk Crescent, Houston, outside Glasgow.
The Guardian newspaper reported Dr Abdullah was born in Aylesbury, Buckinghamshire, where his father, also a doctor, worked.
After moving to Iraq, he studied at al-Mansour high school in Baghdad and later at Baghdad College, the paper said.
DR MOHAMMED ASHA
Mohammed Asha, 26, who lives in Newcastle-under-Lyme, Staffordshire, was arrested on the M6 motorway in Cheshire on 30 June.
He has since been charged with conspiracy to cause explosions.
He appeared at the Old Bailey via video link on 5 October when he was remanded back into custody.
A plea hearing was set for 18 January and a trial is expected to take place next autumn.
Dr Asha is of Palestinian descent but grew up in Jordan.
Dr Asha's father Jamil told the BBC that his son "never showed any signs of growing militancy" during his three-year stay in Britain and called his arrest a "mistake".
He said they "were in phone contact every week" and that his son had been due to visit on 12 July with his wife and their son.
Dr Azmi Mahafzah, who taught Dr Asha at the University of Jordan's medical school for six years, said he was a brilliant student, adding: "I can't even remotely imagine him being involved in extremist activities or terrorism."
"I remember him as a liberal thinker who respected other nationalities and religions"
Dr Asha won a scholarship to the Jubilee School for gifted children in the Jordanian capital, Amman.
Dr Aseel al-Omari, who described herself as a "close friend" of Dr Asha's, attended the same secondary school.
She told the BBC: "I remember him as a liberal thinker who respected other nationalities and religions - that's what we were educated in our schools and in our career as doctors."
Security officials in Amman told the BBC that Dr Asha has no previous criminal record in Jordan.
Several newspapers have said he is one of eight children - six brothers and two sisters - three of whom are doctors and one an engineer.
Dr Asha spent his post-qualification year at the Royal Shrewsbury Hospital and the Princess Royal Hospital in Telford.
He then moved to the University Hospital of North Staffordshire in Stoke-on-Trent where he works as a neurologist.
Dr Asha is married with a young son and lives with his family in Sunningdale Grove in Newcastle-under-Lyme.
His wife Marwa, 27, was arrested with him on the M6 but she has since been freed without charge.
Dr Asha is believed to have completed an eight-week placement at the city's Addenbrooke's Hospital.
He is being held at the high-security Belmarsh Prison.
DR MOHAMMED HANEEF
On 27 July Australia's director of public prosecutions announced that the charge against Dr Mohammed Haneef was being withdrawn.
Dr Haneef, 27, was arrested at Brisbane Airport.
An Indian national, he was detained while trying to board a plane to India with a one-way ticket.
He was charged on 13 July with providing support to a terrorist organisation.
Dr Haneef studied medicine at the Rajiv Gandhi University of Health Sciences in Bangalore between 1997 to 2002, achieving a second-class degree.
His family comes from a small town 250km outside Bangalore and his late father was a teacher.
His cousins are Sabeel and Kafeel Ahmed.
Dr Haneef had been working as a senior house officer at the Gold Coast Hospital since September 2006.
Before that, he worked at Halton Hospital in Cheshire.
Colleagues at the Gold Coast Hospital regarded him as "a model citizen with excellent references," he added.
Dr Haneef was employed under Australia's temporary skilled worker scheme.
His sister, Sumayya, told the Associated Press her brother had been trying to return to India to see his daughter who was born on 26 June.
And she told The Australian newspaper: "His character is like a mirror - clean."
KAFEEL AHMED
The second man detained at Glasgow Airport was named as Kafeel Ahmed. He had suffered burns to 90% of his body when he was arrested and died from his injuries on 2 August.
The 27-year-old, from Bangalore, India, was one of two men detained at the airport after a burning car, packed with propane gas canisters, was driven into the terminal building.
He died in a specialist burns unit at Glasgow Royal Infirmary, where he had been kept under armed guard.
It emerged that contrary to earlier reports, Mr Ahmed was not a medic but an engineer with a PhD in design and technology.
It is understood he began his studies at Queen's University, Belfast, in 2001 and remained in Northern Ireland until 2004.
It is believed he lived in rented accommodation in Hampton Place, close to the university.
He studied for his PhD in the department of design and technology at Anglia Polytechnic University (now called Anglia Ruskin University) in Cambridge, it is believed.
Mr Ahmed is thought to have returned to Bangalore in August 2005.
His brother is Dr Sabeel Ahmed.
DR SABEEL AHMED
Dr Sabeel Ahmed, 26, was arrested near Liverpool's Lime Street station on 30 June and was charged under the Terrorism Act on 14 July.
He appeared at City of Westminster Magistrates' Court, in London, on 16 July, accused of not disclosing information that could have helped police arrest a suspected terrorist. He was remanded in custody.
He appeared again at the Old Bailey, via video link, on 5 October and was remanded back into custody.
A plea hearing was set for 18 January next year and a trial is expected to take place next autumn.
The BBC learned that he had been working at Warrington hospital but has also worked at Halton - both are part of North Cheshire NHS trust.
He is from Bangalore in India and trained as a doctor at the city's Rajiv Gandhi University of Health Sciences - the same place Mohammed Haneef who was arrested in Brisbane trained. He qualified in 2005.
Dr Sabeel's parents are also both doctors and live in an affluent neighbourhood in Bangalore.
His mother, Dr Zakia Ahmed, has told the BBC that her son is second cousin to Dr Haneef.
And she said her son followed Dr Haneef to Britain to work.
His mother also said her son last visited his family in May this year.
She said she learned of his arrest through friends and has been able to speak to him briefly since he was detained.
She said her son was reapplying for his UK visa because he was hoping to do a post-graduate course.
"He calls me everyday", Dr Ahmed said, and "only talks about his patients and how his day went. As fellow doctors that's the only thing we talk about.
"This is all a mistake - he is innocent."
MARWA ASHA
The wife of Dr Mohammed Asha. She was arrested with him on the M6 motorway in Cheshire on 30 June but was freed without charge on 13 July.
28-YEAR-OLD MAN
A 28-year-old trainee doctor was arrested at the Royal Alexandra Hospital, in Paisley, Scotland, on 1 July. He was freed without charge after being held at London's Paddington Green police station.
25-YEAR-OLD MAN
A 25-year-old trainee doctor was arrested at the Royal Alexandra Hospital, Paisley, on 1 July. He was freed without charge after being held at London's Paddington Green police station.
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