Except that the government stopped the EU agreeing to it once before by using the veto. Andrea Leadsom will not want to crack down on tax loopholes.
"There was further criticism when it was revealed that she had received a series of donations totalling £70,000 from a firm based in London but owned by her Guernsey-based brother-in-law, Peter de Putron, via a holding company in the British Virgin Islands tax haven. Leadsom's husband Ben is a director of the firm which made the donations, which were used to pay the salaries of staff in Leadsom's Westminster office after her election as MP; the firm has also made donations of £816,000 to the Conservative party. Because the firm making the donations, Gloucester Research (later becoming GR Software and Research) was based in London the donations conformed to the rule banning political donations from abroad. The Labour MP Tom Watson said: “These very large donations might be within the rules, but it certainly isn’t right that a Treasury minister has been taking money in this way. Most reasonable people will see this as completely unreasonable”."