Mr Amanazi already has family living in Britain
Amr Armanazi is under international sanctions after he was accused of running a facility involved in the production of nerve gas and other weapons of mass destruction.
And US officials claimed he heads the Syrian Scientific Studies and Research Centre in Damascus, which intelligence agencies believe is the centre of Assad’s “non-conventional” weapons programme.
The US State Department said: “The SSRC also has a public civilian research function; however, its activities focus on the development of biological weapons, chemical weapons and missiles.”
Bisher Armanazi has been granted British citizenship
But despite being blacklisted as far back as 2012 for his role in supposed war crimes, his brother Ghayth and youngest son Bisher have reportedly been allowed to enter Britain.
And the pair have even been handed British passports to join the rest of their family in the UK, according to the Daily Mirror.
Ghayth has at least two properties in West London – a £1.2m flat in Fulham and another in leafy West Kensington worth £1.5m.
Horrific images depict sickening chemical gas attack in Syria
Tue, April 4, 2017
At least 58 people, including nine children, were killed in an air raid that released "toxic gas" on the rebel-held Syrian town of Khan Sheikhoun
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A child receiving treatment at a field hospital after an alleged chemical attack in Idlib, northen Syria
Bisher, who works for a City investment bank, lives in a £700,000 flat in Putney, south west London.
While Armanazi’s other son Zayd, 36, has lived in a £1.1m flat in West Kensington since he arrived in the UK in 2009.
He was a regular visitor to the UK before the Syrian civil war broke out.
Bashar al-Asaad is accused of war crimes after the gas attack
Armanazi was accused of producing sarin nerve gas
He then moved to the capital permanently, and studied electrical engineering at Imperial College London- graduating in 2002 before joining UBS investment bank as an equities trader.
Mr Armanazi’s family in the UK, who deny he is involved in military activities, described last week’s massacre as a “heinous crime”.
A woman answering the intercom at Zayd’s home yesterday said: “He’s not in and he won’t be commenting.”
A woman at Bisher’s home said: “He’s not here.”