Parliamentary Voting System and Constituencies Bill

Could the noble Lord address something very specific that I suspect will happen? If a wealthy person domiciled in Monaco buys up all the billboards in Scotland for example as part of his or her campaign for or against the question in the referendum, what means are there of accounting for it one way or another? Is there a transparent way that it can be accounted for as the noble Lords, Lord Howarth and Lord Campbell-Savours, have asked? It is not a mischievous question—it is an issue that could arise.