Note that the article is talking about the Commons, not the Lords. Still, it fails to mention the Reform Act 1867, passed by a traditionally landed Parliament

Note that the article is talking about the Commons, not the Lords. Still, it fails to mention the Reform Act 1867, passed by a traditionally landed Parliament and which substantially increased the franchise; it is this change that can be thought to have had at least some causal role in decreasing the proportion of members of great landowning or squire families among Members of Parliament from nearly 66% in 1866 to 58% following the 1868 general election;[0] the Commons that passed through the Education Act 1870 was thus still mostly drawn from the traditional landowning class. [0] https://onlinelibrary.wiley.com/doi/full/10.1111/j.1750-0206.2013.00311.x https://onlinelibrary.wiley.com/doi/full/10.1111/j.1750-0206...