Slothrop
Tight but Polite
I see why 'could' has anything to do with it. It's not like the polling cards said "7am-10pm, arrive before 7pm to avoid disappointment".Presumably, if they finish work at 9, they could get down the polling station before work then? People not getting to polling station on time does not = void election, banana republic.
I don't think it makes any significant difference overall, but it's definitely a failure of the polling stations, not the voters. If you tell people they can vote any time before 10pm, don't be surprised when they turn up any time before 10pm.