Son of hook-handed hate preacher Abu Hamza flees the UK to fight alongside rebel groups in war-torn Syria

The son of hate preacher Abu Hamza has left the UK to fight alongside rebel groups in Syria, it is believed.

Since making the 22,000-mile journey, Sufiyan Mustafa, 22, has played an active role in fighting and was involved in the siege of Aleppo, intelligence insiders claim.

It is unclear if Mustafa is fighting alongside Islamic State fighters or members of other rebel groups.