It's a bit of fucking around but you can actually pay 0% CGT if you sell your assets and don't return to The UK for 5 years. Island hopping in The Far East would he my preferred option.
Discussion
Yes, I am aware of some of the options.
The problem is you are still technically under the UK tax authority control and in a failing system, they can change the rules faster than Concorde used to be able to fly.
But that is probably going to be my strategy if they implement the 40% quicker than I can leave.
Also, I can come back for up to 91 days per year.
Also my wife would have no restrictions, she has an extended family in the UK and would want to spend more time here.