Former Cobra chief Colonel Richard Kemp says British citizens suspected of being radicalised must be interned without trial following Manchester bombing

A FORMER Cobra chief says all British citizens feared to have been radicalised should be imprisoned without trial - even if there isn't enough evidence to prosecute them.

Colonel Richard Kemp also said non-Brits suspected of extremism should be instantly deported, and anyone trying to return to the UK from Syria barred from entering the country.

Retired Army commander Colonel Kemp - who led the Army in Afghanistan in 2003 - told Good Morning Britain: "We have the finest intelligence services and the finest police force, they have protected us from this kind of attack time and time again.

"The problem is there are 3,000 known jihadists on the streets of the UK today.

"Our intelligence services and police - no matter how good they are - cannot monitor all of them, they can't control all of them.

"People like the bomber in Manchester and the attacker in Westminster... were known to the security services, yet they slipped through the net.

"We do it on the say-so of a senior judge who goes through a judicial process, who's presented with the intelligence.

"If the case is strong enough to convince the judge, he is then interned without trial."

His comments came just minutes after Brendan Cox, the widower of murdered MP Jo Cox, spoke out against hatred and division.

Steve Howe, the husband of Alison Howe who was killed in Monday's attack, also told GMB that Britain needed to be tougher on extremists.

Several people are still missing after the attack, which killed 22 and injured 119 including children.

A bomb factory has reportedly been found in the Manchester home of suicide attacker Salman Abedi, who was just 22.