the UK as a member of the EU always had control of its laws, money and borders
The UK did not have control of its own laws. Denning's dissenting opinion stated above (see McCarthys Ltd v Smith - link below) was approved by the ECJ following an appeal from the HoL, who had ruled Ms Smith had no claim because the EC treaties could not be used as an aid to interpreting UK law.
The question of sovereignty is moot in the UK. The royal prerogative and the principle that parliament cannot bind parliament (see Dicey - link below) and Madzimbamuto v Lardner-Burke (link below) are what Denning and his colleagues from 1972 to 2020 wrestled with in terms of EU membership. To claim that Denning was wrong shows a lack of understanding both of EU law and the UK constitution.
But in the bit of the judgment quoted, he acknowledges that parliament could pass a law that contradicts EU law. However, in the absence of a clear and express intention written in by Parliament EU law could be used to interpret UK law.
the UK as a member of the EU always had control of its laws, money and borders
The UK did not have control of its own laws. Denning's dissenting opinion stated above (see McCarthys Ltd v Smith - link below) was approved by the ECJ following an appeal from the HoL, who had ruled Ms Smith had no claim because the EC treaties could not be used as an aid to interpreting UK law.
https://en.wikipedia.org/wiki/Macarthys_Ltd_v_Smith
The question of sovereignty is moot in the UK. The royal prerogative and the principle that parliament cannot bind parliament (see Dicey - link below) and Madzimbamuto v Lardner-Burke (link below) are what Denning and his colleagues from 1972 to 2020 wrestled with in terms of EU membership. To claim that Denning was wrong shows a lack of understanding both of EU law and the UK constitution.
https://publications.parliament.uk/pa/cm201011/cmselect/cmeuleg/633ii/633we02.htm#:~:text=4.,%2D40)%20was%20as%20follows%3A&text=Parliament%20may%20by%20statute%20make,to%20uphold%20and%20enforce%20it.%20was%20as%20follows%3A&text=Parliament%20may%20by%20statute%20make,to%20uphold%20and%20enforce%20it.)
https://en.wikipedia.org/wiki/Madzimbamuto_v_Lardner-Burke