 In a report about the policing of the 2009 G @-@ 20 London summit protests , Denis O 'Connor , the chief inspector of constabulary , stated that the routine use of FITs at protests " raises fundamental privacy issues and should be reviewed " . He also said that there was " confusion " over the role of FITs and advised that the Home Office should issue guidance over the legality of the surveillance of protesters and the retention of images . 
