@Kendodd
You, like many other posters, forget that Brexit came about due to an act of Parliament in accordance with UK law. The Gina Miller case established that the government did not have the authority to leave the EU on the outcome of the 2016 referendum.
UK joined the EEC on 1 January 1973 without a referendum beforehand.
Also, as has been stated previously, the electorate was given the opportunity to cancel Brexit in the 2019 general election, but they declined. So, I guess they weren’t convinced that experts were correct.
Based on their past and current record, I too am not convinced “experts” are capable of forecasting the future with accuracy. For example, Brexit was meant to increase unemployment by 500,000 to 800,000. The NBER estimated that Brexit has reduced unemployment by 3% to 4%.
However, the opposite happened. As per the ONS measured data, unemployment declined from 2015 to Q4 2024.