Frankly Dave I too do not have that much optimism that we will see the MAX fly again in Europe, or the UK in time for S20 season (ie May 1st onwards) so S21 could well be the case....
We still seem nowhere near any fix from the manufacturer that the worldwide Certification Agencies can look at to seek approval.
They will also likely wait for the official ET crash report to be published, then we have the issue of pilot training/re-training etc.
What do you think?
Best R.