- 3 updates
Human Rights campaign group Liberty has called on Parliament to act over allegations police 'tried to spy' on Cambridge University students.
It said 'proper judicial checks' on police surveillance were 'badly overdue'.
And it warned that if protest groups were now considered 'fair game' it undermined policing and democracy itself.
Cambridge University's Students' Union said it is "alarmed" by claims that police 'tried to spy' on its members.
The Guardian newspaper has obtained a video of an officer trying to recruit an informant to target protest groups.
The Students' Union said it "condemned" the action and wants the government to look at how UK security forces use surveillance.
The National Union of Students (NUS) described it as "an absolute scandal".
The NUS said it undermines students' right to protest and demands to know just how widespread the practice is.
The Guardian claims police officers tried to spy on students at Cambridge University.
Footage obtained by the newspaper appears to show an officer trying to persuade an activist to become an informant in return for money.
The officer asks for information on potential supporters of groups including UK Uncut, the English Defence League, Unite Against Fascism and anti-fracking demonstrators.
He requested names of students going to protests and lists of the vehicles they were using.
But the would-be informant was secretly filming the meeting to expose what was going on.
Cambridge University declined to comment, saying it's a police matter.
A spokesman for the county's police force said:
"Officers use covert tactics to gather intelligence, in accordance with the law, to assist in the prevention and detection of criminal activity."