The coroner at the 7/7 London bombings inquests has formally ruled that the 52 people who died in the suicide attacks were unlawfully killed.

Newsnight hears accounts from people involved in the fourth and final attack that day, when 18-year-old Hasib Hussain detonated his device on a double-decker bus in Tavistock Square, and killed 13 people.

Newsnight's 7/7 coverage continues with a special programme on Friday 6 May 2011 at 7.30pm on BBC Two.