The vast majority of 'Scotland's Oil fields' which are legally British and would be negotiated in any break-up are actually close to the Shetlands, who on 11th September 2020 - " The Shetland Islands Council has voted 18-2 to explore ways of looking at independence - and claim its geographical share of North Sea oil. "
Again with fishing "One-quarter of all the fish landed in Scotland in 2016 was landed in Shetland" - so if Shetland Leave, Scotland are definitely buggered
You think that legality will stand up, once the UK gets divided?
Do you think England would get more of a share, or less of a share?
Do you think Shetland would want independence from England or Scotland and the EU?
If Shetland left, then they are not going to ditch Scotland and team up with England are they? They would ditch both and go on their own and be absolutely loaded, which is of no benefit to England, so don't do anything to risk that. They would no doubt want to trade massively with the EU, they would be a bigger customer than us. Same thing applies to fish. If Shetland ditched us, they would be back in the EU in no time, if it suited them better.