Boris is better off out of it, in my opinion. Things will deteriorate badly in UK, as they will in all countries not honoring the Austrian Economics ideal of issuing money to reflect product, whilst the product missed is the Joules received from the sun.
We can expect banks and money issuers to hold out against this until they themselves are in physical danger as a result of trying to continue the old system of money-as-debt.
Until then we'll see folk continuing to die by the millions in all places including war zones. It will get uglier, like it has in Sri Lanka. Boris won't regret being out of it when that time comes, it seems to me.