The number of convictions on terrorism charges in Britain have doubled in the past five years, according to a new study.
The 1,000-page study, obtained by The Sunday Times, will be launched this week by Britain's anti-terrorism chief and Scotland Yard Assistant Commissioner Mark Rowley.
It also disclosed that women's involvement in Islamist- inspired terrorism has increased three times over the same period.
Stabbings or threats to behead have also increased, from just four incidents in 1998-2010 to 12 since, and now form almost half of attack-related
convictions.
The study also raises concerns of segregation within Britain's Muslim communities as a tenth of all Islamist terrorists come from just five areas in
Birmingham.
These heavily Muslim and deprived neighbourhoods have the highest number of convictions.
"This study identifies some significant new challenges for the authorities, including keeping track of a new generation of terrorists. I hope it will
also tackle some of the myths that are prevalent in this area," The author of the report, Hannah Stuart of the Henry Jackson Society, told the
newspaper.
Among her findings is the revelation of some geographical clusters of terrorism in the UK which do not necessarily correlate simply to areas with
a high Muslim population.
Birmingham, with 234,000 Muslims, has a total of 39 convicted terrorists.
This is more than the whole of West Yorkshire, Greater Manchester and Lancashire regions put together, even though their Muslim population is
650,000, nearly three times that of Birmingham's.
Just five of Britain's 9,500 council wards all in Birmingham account for 26 terrorists, a tenth of the national total.
The study also dismisses claims that attacks are committed by "lone wolves" as only 28 of the 269 acted alone.
Almost 80 per cent were affiliated to, inspired by, directed by or linked to extremist networks.