Questions to ask.
1. What do the EU want, in detail, from a trade deal?
2. What does the UK want, in detail, from a trade deal?
3. How to balance 1 and 2 to reach common ground?
We don't know 1 and 2. And there's £648 billion of trade riding on it.
And I keep stressing - very different situation this time given the number of subjects covered by a trade deal.