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Islamic extremists in Britain are openly trying to recruit children via the internet, a report warns.
They are using websites which carry messages of hate from terror suspects, according to the respected Civitas think-tank.
The study, by its Centre for Social Cohesion, reveals how fanatics are using the Web to bypass the anti-terror laws passed in the wake of the 2005 London bombings.
Extremists are no longer delivering hate-filled sermons and distributing propaganda on street corners, but instead use pro-jihadist websites.
Some of these carry calls for the flag of Islam to 'fly over Downing Street', and urge militants to attack Jews and Christians.
Most worrying are sections of the sites dedicated to the radicalisation of children.
One message from controversial preacher Omar Bakri - now exiled to Lebanon - says children should be brought up to spread Islam through jihad.
Mothers are also using the websites to rail against British education. One writes: 'As part of GCSE, they must study Shakespeare, whose books are full of homosexuality, fornication and adultery, each of which are great sins in Islam.'
The websites also routinely carry rants by fanatics such as Abu Hamza, Abdullah el-Faisal, Abu Izzadeen and Abu Qatada.
All have been either imprisoned or deported to stop them enciting terrorist violence in Britain.
James Brandon, the report's author, said: 'Recent arrests, trials and convictions have undeniably damaged the ability of UK-based jihadists to recruit, raise funds or openly spread their ideology.
'However, these extremists have now re-grouped on the internet ... where they can operate with impunity.'
The websites also distribute material written or produced by international terrorist organisations such as Al Qaeda.
Mr Brandon said the existence of such websites run by UK-based individuals demonstrates 'that the Government's current approach to tackling online extremism is failing'.
In the most inflammatory recordings, speakers tell their Muslim listeners that they are obliged to fight non-Muslims.
In one recorded talk on www.islambase.co.uk, Abu Hamza tells listeners that the Jews and Christians should be fought until they accept living under Muslim rule
He says: 'You should take the means to do it. If you cannot do it, our children (can).'
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