British extremists fighting for the Islamic State in Iraq and Syria want to come back to the UK but fear they will be jailed, a leading radicalisation professor said.
A jihadist, claiming to represent 30 others, contacted researchers at King's College London through social media to say there is a growing feeling of disillusionment amongst fighters who feel they cannot return to Britain.
The extremist said those who travelled to fight the Assad regime in Syria are are being forced to fight rival rebel groups.
"The people we have been talking to ... want to quit but feel trapped because all the Government is talking about is locking them up for 30 years," Professor Peter Neumann told The Times.
He said the Government should consider a "deradicalisation programme" for the Britons who wish to return.