F1mod. SI 2003/1557
4N.I. Personation
(1)A person shall be guilty of personation if at any election he—
(a)votes or applies for a ballot paper as some other person, whether that other person is a person whose name appears as an elector in the current register or is the proxy of such an elector and whether that other person is living or dead or is a fictitious person; or
(b)votes or applies for a ballot paper as proxy for another person, knowing or having reasonable grounds for supposing that the proxy paper appointing him has been cancelled or that that other person is dead or is a fictitious person.
(2)For the purposes of this paragraph, a person who has marked, whether validly or not, and returned a ballot paper issued for the purpose of voting by post, shall be deemed to have voted.