G20 probe officer comes forward

The police officer thought to be shown in video footage of the G20 protest in London pushing a man who later died has come forward.

An independent criminal probe has begun into the death of Ian Tomlinson, 47, who had a heart attack minutes later.

The Independent Police Complaints Commission (IPCC) is trying to identify officers who were at the scene.

Daniel Sandford reports.

Exclusive footage obtained by Guardian.co.uk