A new anti-terror law in Britain that makes it a criminal offence to encourage terrorism by glorifying it was given the Royal Assent on Thursday.
Terrorism Act 2006 makes it a criminal offence to encourage terrorism by glorifying it and widens grounds for the ban to include groups that do so.
The Act extends the maximum period for which a person can be detained prior to being charged under terrorism legislation from 14 to 28 days, while also increasing the maximum penalty for a number of terrorism-related offences.
"The government is determined to do everything possible to protect our citizens from those who seek to destroy our society, our way of life and our freedoms," British Home Secretary Charles Clarke said.
The Act sought to strike the right balance between ensuring that law enforcement agencies were equipped to tackle terrorism and upholding the freedoms that Britain holds dear, he added.
Disseminating terrorist publications through bookshops and the internet and giving and receiving terrorist training or to attend a terrorist training camp have also been made criminal offences under the legislation.