Political Parties and Elections Bill

I hope that the House forgives me, but at the moment I am struggling to understand the rationale for the amendment. The Secretary of State has provided no justification for it. If someone is entitled to vote in a general election, what is the rational connection between participation in the tax system—someone might be abroad for a few years, working as an expatriate—and not being allowed to donate? If the Secretary of State would address that fundamental issue, I am sure that the House would be grateful.