Last week I attended the History of Parliament lecture given by Lord Norton of Louth (Philip Norton) "Resisting the Inevitable? The Parliament Act 1911". It was a very informative and interesting speech - which is available on BBC iPlayer at http://www.bbc.co.uk/i/b0170422/.
Can I also recommend taking a look at the History of Parliament website, and at Parliament's webpages with resources on the 1911 Act.
(http://www.parliament.uk/about/living-heritage/evolutionofparliament/houseoflords/parliamentacts/)
Lord Norton blogs on both the Lords of the Blog and his own personal blog.