To be fair on the BA they are / were in a no win situation, with everyone clamouring for a statement telling them what they could or couldnt do, in as short a time as possible, now we have expansion of the details filtering down, that may suggest some of the interpretations by the BA with the knowledge they had at the time, might have been a bit over the top, all those people who clamoured for a statement 'now' are complaining that the BA made mistakes.
If you try and rush anything through, mistakes are going to happen, its how you handle the aftermath and re-issue an updated correct statement that matters, and even then, for some if it says something they dont want to hear, you will still get the complaints.
The government advises that non essential travel is not allowed, I am working from home mostly, yet still as I am a key worker in an infrastructure supply industry, i have been issued with a letter to cover any travel i need to do for work.
if you are stopped and questioned while travelling to your boat, I hope you have an explanation that satisfies the questioner.
we all need to stop and ask ourselves if the journey we need to make is essential, for the second day i see frost on the grass outside, but have the temperatures dropped low enough for boaters to be concerned yet, I am sure that if we get a cold spell forecast, then winterisation will be deemed a necessary excuse for travel, in the mean time consider that those boatyards that are still open will need work for their staff, and winterising peoples boats for them could be the difference between keeping staff on and surviving to next year, or not.