If I was Boris Johnson, I’d announce with much fanfare on 31st January: ‘We’ve left! Brexit is done!’ then I’d forget to file the paperwork. I wonder if anyone would notice.
I think we've gone way beyond that. We'll have to Leave, and Leavers will have to deliver on their promises of unicorns shitting gold. With a majority of this size, all excuses are gone.
In the meantime, the creeping climate catastrophe will almost certainly reshape the globe in ways as yet unforeseen. In the rear view mirror of history, Brexit might seem like two bald men fighting over a comb.
I guess we could be entering a period akin to the interregnum. However once the EU has lost the dead weight of the UK, it's highly likely that wherever it finds itself in 10, 20 years time will not be a place the UK will ever want to be - even if the EU of 2040 was receptive to a re-entry.