On fishing there has in fact been some progress within the EU, but it seems that it would be naïve to suppose that British policy would be much better. Also, I cannot see how international agreements on quotas designed to prevent depletion of stocks would be easier to negotiate with European countries when some of our leading politicians have insulted Europeans and we have walked away from the EU.

On throwing dead fish back, see

https://www.bbc.co.uk/newsround/21608848