Families of victims of the 2005 London transit bombings on Monday abandoned a legal bid to force the government to hold a public inquiry into the terrorist attack that killed 52 people.
A coroner's inquest that ended in May thoroughly investigated the role of the emergency services and the MI5 spy agency, with the identified failures being addressed by the relevant agencies, said Clifford Tibber, a lawyer representing 25 victims' families.
"Against that background our clients recognize that any inquiry into those matters ... would cause further unnecessary distress to the bereaved families, those that survived and the individual members of the emergency services who attended the scenes," he said.
Some of the victims' relatives say they still have unanswered questions about the role of the spy service, which had two of the bombers on its radar but failed to pursue them.
The coroner's inquest rejected claims that security agency failings contributed to the deaths, though it did criticize MI5's record-keeping and use of surveillance photos.
The government says procedures have since been improved.
Fifty-two commuters died when suicide bombers attacked three London subway trains and a bus on July 7, 2005.