As of 17 June 2019, the Rightmove House Price Index indicates that the average cost of a property in the UK is £309,348; just £91 short of the all-time record reached in June 2018.
In any month before July 2023, will the Rightmove House Price Index indicate that the average cost of a property is equal to or less than £216,543; a nominal decline of 30% from June 2019 levels?
Resolves positively if so, negatively if not, and ambiguously if the Rightmove House Price Index is discontinued or its methodology is changed so substantially that administrators believe it is no longer reasonable to continue this question.