Your view/take on this seems to be contradicted by Mike Park.
Mike Park, Chief Executive of the Scottish White Fish Producers Association, said:
“Setting politics aside, the members of SWFPA are deeply aggrieved at the very challenging situation they now face for 2021.
“Whereas we have gained modest uplifts in shares for some stocks the stark reality is that the demersal sector enter 2021 facing significant shortfalls across a range of key species, which is down to the fact that we can no longer enter into direct swaps with colleagues in Europe.
“In addition, the issue of sovereignty and our future ability to negotiate additional shares after the five and a half year window would seem clouded by so much complexity that it is difficult at this time to see how the UK government can use its newly recovered sovereignty to improve the situation of my members.”
Now this was 2021 things may have changed significantly, I doubt it tho.
Full analysis here,
https://www.gov.scot/news/brexit-dea...20and%20Saithe.