The rights of more than 1,000 UK prisoners were breached when they were prevented from voting in elections, European judges have ruled.
The case was brought by inmates who were in prison during various elections between 2009 and 2011.
This is the fourth time the UK has been found in violation of its blanket ban on giving convicted prisoners the vote.
The European Court of Human Rights has repeatedly called for a change in the law but this has not happened.
Both the previous Labour government and current coalition have failed to legislate – although various proposals have been debated in an attempt to end the long-running row with the Strasbourg court.
This latest case concerned 1,015 prisoners, a grouping of long-standing prisoner voting cases, and the court ruled there had been a violation of Article 3 of the European Convention on Human Rights – right to a free election.