Today in Parliament: Democracy Day

Susan Hulme and Sean Curran mark the 750th anniversary of the first English parliament with reports from Westminster and assemblies and parliaments at home and around the world.
From arguments over Trident at Westminster to events at Holyrood, Cardiff Bay, and Stormont.
The programme also hears from BBC correspondents in Washington and Moscow and reports on the proceedings at the European Parliament.
And Mark D'Arcy investigates the hidden hearings and debates that go on all the time within the Palace of Westminster.