What criminal charges could be brought over the Post Office Horizon IT scandal?

It is the biggest miscarriage of justice in British History. But almost two years after the ITV drama made it a burning issue, are we any closer to justice over the Post Office Horizon IT scandal?

Hundreds of subpostmasters were wrongly accused of stealing and jailed. Thousands more lives were ruined.

So what punishment could those responsible face? Senior Investigations Producer Isabel Alderson-Blench and Investigations Editor Daniel Hewitt tell Daniel Hewitt what you need to know.