Obrogation: to alter the law by passing a new law. From previous post: "The UK's European Union (Withdrawal) Bill now only requires Royal Assent, which will be on 26 June 2018..." :our Independence Day is assured.
Brexit Central:
"the Government’s flagship piece of Brexit legislation did indeed receive its Royal Assent yesterday when the Queen formally signed it into law. Lest we forget, Section 1 of the now European Union (Withdrawal) Act 2018 states 'The European Communities Act 1972 is repealed on exit day” - with exit day explicitly defined in the Act “as 29 March 2019 at 11.00pm'"My emphasis. Here it is (PDF)
