Which MPs get elevated to the UK House of Lords?

Using logistic regression and a dataset of 816 MPs who sat in the UK House of Commons between 1997 and 2019, we analyse which MPs get elevated to the upper chamber. Drawing on literatures concerning progressive political ambition, the UK Parliament and the wider nature of the British state, we test hypotheses concerning loyalty, expertise and nepotism. We find evidence to support all three but expertise in the form of frontbench experience and, for those MPs without such experience, loyalty appear to be the most important factors driving elevation. Our research has implications for debates surrounding House of Lords reform.