Sch 1A para 7
(1) A person registered under paragraph 5 or 6 who, on any day, ceases to make or have the intention of making taxable supplies in the course or furtherance of a business carried on by that person must notify the Commissioners of that fact within 30 days beginning with that day. (2) But the person need not notify the Commissioners if on that day the person would otherwise be liable or entitled to be registered under this Act (disregarding for this purpose the person's registration under this Schedule and any enactment that prevents a person from being liable to be registered under different provisions at the same time).