During the 2011 riots, Starmer prioritised rapid prosecutions of rioters over long sentences, which he later thought had helped to bring "the situation back under control". Later that year, after revelations concerning the undercover police infiltration of environmental campaigns, Starmer ordered a review of related convictions and invited protestors convicted of aggravated trespass to appeal their sentences. Starmer declined to authorise a wider enquiry, after a report from the judge Christopher Rose found the issue to be a result of individual fault rather than a systemic problem.