I understand that the British government did a lot during the Troubles. For one, the right to remain silent was weakened. Special counterterrorism units were

I understand that the British government did a lot during the Troubles. For one, the right to remain silent was weakened. Special counterterrorism units were created ( https://en.wikipedia.org/wiki/Military_Reaction_Force https://en.wikipedia.org/wiki/Military_Reaction_Force ), which were accused of committing several crimes. And, although it wasn't an official policy, businesses added enough closed circuit television cameras that it became impossible to pull off anonymous attacks in London.