If I was in Britain I would not want to be in the EU
The foundations of national sovereignty are the currency-issuing capacity of the national government. The foundations of a democracy include the ability of the citizens of that currency zone (the ‘national government’) to choose the political representatives at regular intervals who will make decisions on their behalf. A direct chain of responsibility between the elected officials to the voters is thus established and the citizens can take action accordingly if they feel they are being disadvantaged by the legislative outcomes. The anathema of this sort of direct responsibility and accountability is the European Union, which is cabal ruled by unelected officials (in the conventional sense) who are not held accountable for their decisions, no matter how poor they turn out to be. The history of the Eurozone is one of policy failure with millions of people rendered unemployed, in poverty, or otherwise disadvantaged by the destructive decisions made by successive European Commission administrations. There was a good reason why the French president Charles de Gaulle resisted the development of supranational power blocks in Brussels and elsewhere (for example, in Frankfurt under the Eurozone). His preference for Inter-Governmental relations, where large common issues such as climate change, migration, rule of law, etc could be decided upon by representatives of each Member State government, without surrendering national sovereignty, was sound. Given all of that, the United Kingdom should exit the dysfunctional European Union immediately and only negotiate with other states on a government to government basis.