You Brexit, you fix it
Say what you will about Theresa May, but she is absolutely ruthless and seems to have a nice sense of humour. On her first day in office, and within the first six hours, she sacked 10 cabinet members, most of them from Cameron's old boys network, and made a number of refreshing appointments:
Three hardcore Brexiteers (Boris Johnson, David Davis, and Liam Fox) get jobs as Foreign secretary, Brexit secretary, and international trade secretary. In other words, they have to deal with everyone they pissed off during the last months. Every failure in upcoming Brexit negotiations will be blamed on them.
Johnson's department of foreign affairs has been practically gutted; all he can do is fly around the world and give speeches. He has been set up for failure.
Priti Patel now heads the Department of International Development. She is on record saying that that department should be abolished, and will soon find out how passive-agressive civil servants can be.
Andrea ("as a mother") Leadsom is now secretary for the environment, which also covers farming and fishing. As a Brexiteer, she can now explain angry farmers that they won't get any EU subsidies anymore, and that they won't get any subsidies from London either.
This might actually end in some fun. Some very special type of fun.