The reporting in the Times quotes a senior Govt source saying...
“It’s obviously something the EU would never offer us upfront because they would say you are trying to have your cake and eat it but the reason I think we will get it is because it is overwhelmingly in the businesses interests on both sides,” one said …
So we're back to the German carmakers, French champagne makers, etc, barging down the EU's doors to force them to make a deal that suits the UK.