just to elaborate on this (I’ve been a party-nominated observer at the count before).
All the ballots are first sorted into piles, a pile for each candidate and a pile for the spoiled/confused ballots.
After all the candidate piles are sorted/counted into bundles the election agents & candidates are invited to scrutinise the spoiled ballots. If it’s a very close call on the clearly marked ballots the scrutiny of the spoiled pile can become intense (more likely in a local election where it can truly come down to a handful of votes, but marginal GE seats may also be intense).
Examples I have seen that have been fished out of the reject pile
All candidates have a cross except for one that has a tick (incorrectly completed, awarded to the ticked candidate)
Ballot has comments on each candidate, ‘Massive Tosser’ ‘Big Tosser’ ‘Giant Tosser’ ‘Little Tosser’ ‘Least Tosser’ - Least Tosser’s election agent was able to argue that the voter has a clear preference for their candidate.
Most spoiled ballots I’ve seen say ‘None of the above’ or ‘ Youse lot are all the same’ or are just scribbled over/crossed out, indicating ‘none of the above’.
so spoiling a ballot in a way that both ensures it gets seen by each candidates election agent but still indicates a bit preferred candidate may be possible, no guarantees though.
While no records are kept re: spoiled ballots, anything with a clear message should at least be seared into the mind of candidate and agent, plus party observers and vote counters (council employees) and will hopefully get people talking (although an extremely TWAW candidate/agent combo may not willingly feedback to other party members).
The total number of spoiled ballots is tallied, so an unusually high number should also pique the interest of party campaign organisers & candidates.
I genuinely love count night - quite sad that our locals are no longer counted immediately after ballot closes, but are instead counted the following working day (presumably for financial reasons? Can’t expect daytime employees to ballot count between 10pm and 3am without a decent overtime rate…)
Personally, I probably wouldn’t ballot spoil if I weren’t living in a super safe seat or if a small party that genuinely represented my standpoint existed. (Left of centre, but in old-fashioned, non identity politics, working class community based terms, ie what is disparagingly called ‘Blue Labour’)