I won't deny my ignorance regarding the UK housing market. Here in the US, housing prices are clearly inflated by Fanny/Freddy and artificially low mortgage interest rates.
https://www.fhfa.gov/about-fannie-mae-freddie-mac
> Fannie Mae and Freddie Mac were created by Congress. They perform an important role in the nation’s housing finance system – to provide liquidity, stability and affordability to the mortgage market. They provide liquidity (ready access to funds on reasonable terms) to the thousands of banks, savings and loans, and mortgage companies that make loans to finance housing.