Kate Allen, Director of Amnesty International UK, said:

“Human rights are not an inflexible, blunt instrument designed to prevent the police from protecting people and thwarting crime. However, any decision to block or limit access to social communications must be legal, proportionate and have a legitimate aim.

“It is legitimate, in specific circumstances, to stop people using social media to plan violence and crime. Freedom of expression is not an unlimited right and can be subject to regulation where risks are legitimately perceived.

“But David Cameron must ensure that the fear engendered by the recent riots and the determination to ensure that there is no repeat or escalation of the events of the last week, does not result in a knee-jerk reaction which curtails freedom of expression in a disproportionate way.

“Governments in other countries such as China, Iran, Syria or the United Arab Emirates notoriously inhibit access to communications networks and resources within their countries. Embarking down a road of curtailing free access to the internet and other networks is not a decision the UK authorities should take lightly and it is vital that any censorship does not inhibit legitimate forms of non-violent protest.

“We will await the outcome of the discussions with interest.”