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Former top lawyer says anti-terror laws 'may not be legal'

Former Attorney General Dominic Grieve has voiced concerns about the legality of new anti-terror measures, while Labour has accused the Government of being "unclear" in their plans.

The comments come after David Cameron unveiled a series of new measures including giving police the powers to seize passports at UK borders of British citizens they suspect could be travelling abroad to fight with terror groups.

The move follows the announcement on Friday that the UK's terror threat has been upgraded from 'substantial' to 'severe', with the Home Secretary saying an attempted attack was now "highly likely".

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Cameron: UK facing greater and deeper security threat

Prime Minister David Cameron said IS poses a "greater and deeper threat to our security than we have known before" claiming the UK must confront the terrorist group's ideology.

David Cameron speaking after the UK's terror threat level was raised. Credit: PA Wire

A "firm security response" using all the resources at the UK's disposal was needed to combat the threat, Mr Cameron said.

The Prime Minister warned that Britain was involved in a "generational struggle against a poisonous and extremist ideology" that it could be "fighting for years and probably decades".

"We cannot appease this ideology. We have to confront it at home and abroad," Mr Cameron said.

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