I should add that both agents and election courts predate the #ballotAct - which came into force more than a hundred and fifty years ago and assures secrecy of voting. National political organisations/parties became significant after a legal limit was placed on expenditure on behalf of any individual candidate. Rules on donations came in at the turn of the century - in part in reaction to donations by a businessman in #hongkong to the 1992 #conservative campaign.,
Breaches of electoral law are a matter for the police and the #electioncommission . The candidate's agent has been held to be responsible for a couple of centuries. If the breaches are likely to have affected the result it may go to an election court which may impose criminal penalties and set the result aside - although the latter event is rare! National parties are more difficult to deal with although the #conservatives were in trouble after #ukgeneralelection2015 .
I should add that both agents and election courts predate the #ballotAct - which came into force more than a hundred and fifty years ago and assures secrecy of voting. National political organisations/parties became significant after a legal limit was placed on expenditure on behalf of any individual candidate. Rules on donations came in at the turn of the century - in part in reaction to donations by a businessman in #hongkong to the 1992 #conservative campaign.,