A proposed measure in a housing-supply package due for a parliamentary vote this Friday would make the absence of a required licence a ground for invalidating property sales. Analytically, the change could introduce significant legal uncertainty for buyers, sellers, lenders and conveyancers, risk delaying transactions and cooling market activity unless clear transitional rules and enforcement guidance are set out. Stakeholders will be watching for details on compliance requirements, liability allocation and any safeguards to avoid unintended disruption to the housing market.