Q&A: 7 July 2005 attacks inquests

A security service image of two of the bombers, 17 months before the attacks

The inquests into the deaths of 52 people killed in the 7/7 bombings will last many months. BBC News explains what will happen at the hearings.

What is the coroner's role?

Aren't all the facts already known?

So what else will the inquests cover?

Who will be called as witnesses?

So what did MI5 and the police know?

Can the inquest answer their questions?

Can the coroner hold secret hearings on national security grounds?

So what's going to happen?

What about survivors? Will they feature in the inquest?

What about the inquests for the bombers?

Why have the inquests taken five years to happen?