This is the French, Dutch etc. We aren't doing anything our side. The checks we are bringing in are for goods inbound, particularly food, requiring additional checks and paperwork which were unnecessary when we were in the EU and only add costs which weren't there before. The food itself is produced to EU standards, so above ours, but we still need to do the checks. My understanding is that the EU are increasing their checks too putting more costs on our food producers compared with their European counterparts (I could be wrong on that point though).
Which authorities? The water companies will do it (maybe) for a 40% increase (maybe) in the bills. The Environment Agency isn't set up to do it and the Local Authorities don't have the money. Also, since we left the EU our environmental laws have been relaxed to the point that it is unclear if the Water Companies are actually breaking the law as much as the media would have us believe. Certainly there aren't many cases being brought to court through Offwat or the EA. This Government is pretty anti-environment too, so there isn't any appetite to pursue offenders anyway and the Environment Agency has been cut to the bone and beyond.
Fishing was one of the big lies (and truths) of Brexit. The lie was that we could claim the fish for ourselves post leaving, that was never going to happen (not all the fishing agreements were negotiated with the EU - for example the Belgian and Dutch fleets have rights going back to the 17th century, and due to the nature of the channel we have separate agreements with the French, then cod is negotiated with Iceland which isn't part of the EU anyway... incidentally if I recall the EEC backed the UK in the Cod Wars and prevented Iceland taking an even bigger share of the fish than they have). The truth is we eat very little of the fish we catch and so we export most of it and are reliant on a trade negotiation. The EU demonstrated the truth of Brexit when they just refused to accept any British fish into the EU unless we agreed fishing rights with them. We are so small in comparison that we had no negotiating power and our fishing fleet was thrown under the bus. All the vet and health checks that need to be done now we are a 3rd country means that the fish is going directly into EU ports (so that it remains fresh enough after the checks) having a detrimental effect on our ports. Luckily for us down here the difference between Dover, Ramsgate or Folkestone and Calais, Dunkirk, Dieppe or Ostend is such is only affects shore jobs, Humberside, the North East and Scotland are much more affected as they have to get from the fishing grounds down to their markets in Europe and then head back up north again. Alas, we don't have the negotiating power to change that... but Vote Leave knew this beforehand.
FWIW, I don't think we will go back into the EU for a long time, as the terms that would be offered (i.e. the same as any new country asking to join would get) will be unacceptable as they are so much worse than we had as a member, however, if we don't move closer to the EU then we risk being left stranded, particularly if Trump gets in again in the States. I honestly don't think Brexit can ever be successful when measured against what we had, but it doesn't need to be the disaster it currently is, but it needs honesty from Politicians of all persuasions to come clean about what can and can't be achieved so the we have realistic expectations of what the future holds. In many respects that in itself would be a huge step forward rather than this ridiculous situation where they all deny Brexit has anything to do with the negatives, brandish the most minor benefit (real or imagined) as a massive breakthrough and refuse to engage in any meaningful conversation on the topic. Be honest with us and we can move forward.
I don't get why that has anything to do with Brexit - the policy was adopted in 2023 by Shropshire council, surely we should be up in arms at the government for this? The EU isn't mentioned once in that clip.