@Walter Hinteler,
Very, very interesting, Walter, especially that last link.
Loads of waffle, blah blah blah, legal jargon etc....and then on pages 22 and 23 it gets down to the likely legal ruling.
If you draw a horizontal(ish) line that bisects oil field AUK, and then draw another horizontal line horizontsal(ish) to pass just below oil field ANGUS, then the area between these lines is likely to be deemed as "Common", where both countries can explore and develop.
Above the AUK line would be Scottish, and below the ANGUS line would be English, according to what is estimated to be the most likely ruling.
In that common area are many oilfields, which would be therefore presumably be jointly owned and therefore the income would be equally shared.
Below ANGUS would be English and therefore any income from oil production there would go into the "new" British coffers.
I shall try to find a map and print it up here.....