After already placing £600,000 on the outcome of the referendum the customer has now added a further £200,000 to his wager, and stands to collect £1,093,333.33 should the outcome of the poll be a No vote.
So he only wins 93K if they vote no and loses 900k if they vote Yes? I assume that's tax paid?
Doesn't look like a particularly enticing gamble opportunity to me especially as they are allowing 16 year olds the vote.