The UK HBOS House Price Index is a monthly report that tracks the average change in house prices across the UK. The index is compiled by the Halifax division of Bank of Scotland, and it provides an important indicator of the health of the UK housing market. The index is based on data collected from the Halifax’s mortgage lending database, which covers around 15% of the UK mortgage market. The index is released on a monthly basis and is closely watched by investors, policymakers, and the media.