Re: Brexit means brexit.
"Those that voted to leave did so for many reasons, including immigration, lack of EU accountability, and that the NHS would get more money."
Immigration: An issue spun by the press which appealed to racists. Of all the issues stated as influencing the Brexit vote this is the one that has legs, it's also the issue that the pro-Brexit politicans try to deny. "We're not a tiny bit racist, we just loathe people from Europe coming over here and doing the jobs that Brits won't do or can't do."
Lack of EU accountability: Fictional, the EU is held to account by MEPs, by Heads of State, by auditors, by independent research organisations and ultimately by the electorate.
NHS would get more money: A lie. Even the most pro-Brexit politicians now admit it was a lie.