Cummings has gone now, rather than waiting out the year like he originally intended, because he knows Boris is going to cave next week and agree to anything rather than risk No Deal. He wants to be well out of it when that happens.
Lorries queued up for days on both sides of the Channel while we struggle to get Import/Export Permits (of which there are limited numbers) is bad enough, but not having at least some kind of EU Deal in place when we’re relying on flying Vaccines in from the EU from January might have tipped the balance. Bo-Jo cannot survive losing our access to those vaccines.
Our Bluff has been called.