Concerns have been raised after it was revealed that undercover police used the identities of at least 19 dead children and had long-term deceitful relationships with their activist targets. A judge-led inquiry will examine miscarriages of justice and whether the widespread infiltration of social and environmental groups over the last forty years meant that undercover officers effectively became ‘political police’. After a delay of more than five years and a bill so far of £30m, opening statements at the inquiry into undercover policing began yesterday. David Barr QC counsel to the inquiry, which is being streamed remotely, said that evidence sessions were planned until 2023.