Well, if you wanted to start a shift to British (economic) isolationism than #Brexit looks to have been a good start... for the last five years the UK has been trading less with other countries (importing/exporting less).
If this was a structured & planned strategy then one might have been able to assemble an argument for why this made sense.... but an unplanned & chaotic reduction in trade will likely just be hurting #workers (again).
Didn't 'project fear' have something to say about this?