Michael Cockerell presents a four-part series filmed over the course of a year with unparalleled access to the House of Commons. This series takes an unprecedented look at the heart of British democracy in the run up to the 2015 general election.

In the second episode of this major four-part series, presenter Michael Cockerell explores the upstairs-downstairs world of the House of Commons. We see what goes on backstage at the state opening, when the Queen comes to open the parliamentary year, including a surreal traditional search for gunpowder.

In the third episode of this major four-part series, presenter Michael Cockerell sees how the traditional three-party system appears to be falling apart at the seams. Back-bench MPs are becoming increasingly rebellious as they confront the dark arts of the whips - the shadowy figures who seek to impose party discipline.

In the final part of this major four-part series, battles break out over the future of the House. Speaker John Bercow runs into trouble with his own plans for reforming it. Wealthy Tory backbencher Zac Goldsmith tries to give voters the power to sack their MPs - and the establishment tries to stop him.