This is an excellent must read article published by The Conversation. It argues that EU workers in the UK are highly employed and concentrated in a few key areas of the economy, posing problems if they are no longer welcome post-Brexit.
It looks like, both politically and economically, the UK is unable to stop the flow of EU migrant workers. So if Brexit wasn’t about immigration was it really about national sovereignty? Or did the Brexiters just plain get it wrong?