Well, we'll see that and raise you the European Parliament in Strasbourg.
The EU could get rid of this idiocy overnight, except - well - France.
(I have nothing against the French, I've visited France dozens of times and have many friends there.)
"Once a month the European Parliament moves from Brussels to Strasbourg at a cost of £150m a year as lorries transport paperwork."[0]
"Top EU official brands Strasbourg shuttle 'insane'"[1]
"EU parliament’s €114m-a-year move to Strasbourg ‘a waste of money’, but will it ever be scrapped?"[2]
[0] https://news.sky.com/story/meps-on-the-move-madness-of-stras...
[1] https://www.theguardian.com/world/2006/sep/05/eu.politics
[2] https://www.euronews.com/2019/05/20/eu-parliament-s-114m-a-y...
I'm not saying it's what happened to the UK, but we asked for what we needed, got turned down and then left.
If you haven't already done so, read up on TARGET2[0], things could get somewhat spicy if a Eurozone country were to leave the EU.
[0] https://data.ecb.europa.eu/publications/ecbeurosystem-policy...
All I remember was Cameron asking to expel jobless immigrants, which confused the EU as Britain was already allowed to do that.
I remember Poland stopped us from getting it (supposedly).
The french didn't want us to exempt from financial regulation that was primarily targeted at the euro even though we use the pound.
Various nonsense, that people at the time felt strongly about (keeping the pound, not giving benefits and a council house to people as soon as they arrived, or some such exaggeration)
Completely barking mad.
https://www.politico.eu/article/uk-rejects-eu-plan-tie-defen...