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Two captured British jihadis could be sent to the same high security US jail as hook-handed hate preacher Abu Hamza and shoebomber Richard Reid.

Alexanda Kotey and El Shafee Elsheikh were part of Jihadi John’s Islamic State terror squad dubbed “The Beatles” for their English accents.

The pair are being held in Syria but could end up in Colorado’s brutal ADX Florence prison - known as “a clean version of hell”.

Kotey, 34, from Shepherds Bush, West London and Elsheikh, 29, from White City, West London, may even be placed in the jail’s notorious H-Unit.

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H-Unit is regarded as a “jail within a jail” for the country’s most dangerous prisoners and has fewer than 30 inmates.

But at least five inmates previously lived in London.

They include Hamza, 59, the former imam of the notorious Finsbury Park Mosque and Umar Farouk Abdulmutallab, a University College London undergraduate who tried to blow up a passenger jet in 2009 with a bomb hidden in his underpants.

Richard Reid, 44, from Bromley - who was jailed in 2003 for trying to blow up a plane with a bomb hidden in his shoe - has also spent time there.

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As has web designer-turned Al-Qaeda terrorist Minh Pham, from New Cross in South-East London.

Zacarias Moussaoui, the so-called “20th hijacker” in the September 11 attacks, who once studied at London South Bank University, also spent time in H-Unit.

Kotey and Elsheikh, who are being held in Syria by US-backed Kurdish forces, would spend 23-hours a day in a 12ftx7ft soundproof cell.

Criminals in H-Unit are banned from mingling and are subject to “special administrative measures”.

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The measures restrict their activities so much inmates do not know who is in the next cell.

Evil Hamza is so traumatised by his experiences in the jail he has launched an appeal saying he has been subject to “inhumane and degrading” treatment.

The hook-handed preacher is caged for multiple terror offences.

As well as Jihadi John - real name Mohammed Emwazi - Kotey and Elsheikh were pals with Aine Davis, who was captured and jailed in Turkey.

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Kotey and Elsheikh are accused of carrying out torture techniques including mock executions, waterboarding, and electric shocks on hostages in Syria.

Three Americans and two Brits are among those who the group executed.

But a former counter-terrorism regulator says the Islamic State pair should be sent back to the UK for trial.

Lord Carlile, the UK’s independent reviewer of terrorism legislation from 2001 to 2011, said a British trial was the “proper forum” for justice.

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Lord Carlile said radicalised Brits should be “returned to the country of origin” and tried “in a normal way with British rights, British duties, British obligations and British responsibilities”.

He said: “If people are tried properly, as they would be in the British courts, it would show that the UK is taking a very serious approach to deradicalisation but also to dealing with extremism.”

He also added that he believed the victims’ families would get “satisfaction” and the certainty of a “proper trial” if it took place in Britain.

US officials said Kotey and Elsheikh “are suspected to have participated in the detention, exploitation and execution of Western detainees”.

The US Department of Defence previously said they were “still considering options” with regards to the two men’s future.