Representation of the People Act 1983

40 (1) If a person, representing himself to be—

(a) a particular elector named on the register and not named in the absent voters list, or

(b) a particular person named in the list of proxies as proxy for an elector and not named in the list of persons entitled to vote by post as proxy,

applies for a ballot paper after another person has voted in person either as the elector or his proxy, the applicant shall, on satisfactorily answering the questions permitted by law to be asked at the poll, be entitled, subject to the following provisions of this rule, to mark a ballot paper (in these rules referred to as " a tendered ballot paper in the same manner as any other voter.

(2) A tendered ballot paper shall—

(a) be of a colour differing from the other ballot papers ;

(b) instead of being put into the ballot box, be given to the presiding officer and endorsed by him with the name of the voter and his number in the register of electors, and set aside in a separate packet.

(3) The name of the voter and his number on the register of electors shall be entered on a list (in these rules referred to as the " tendered votes list ").

(4) In the case of a person voting as proxy for an elector, the number to be endorsed or entered together with the voter's name shall be the number of that elector.