How has 7/7 changed London 20 years later?
On this episode of Tonight with Andrew Marr, Andrew speaks with former Home Secretary who was in post during the 7/7 Bombings, Charles Clarke; survivor Ella Young and former explosive dog handler with the Metropolitan Police, who was one of the first to arrive at the scene of the exploded Number 30 bus, Glen Hesketh, in reflections of the horrific attack that killed 52 people.
