What would happen to the Union Flag if Scotland were to vote for independence?
No one knows for sure, but the Flag Institute has passed on some suggestions to i100.
The UK's national charity for flags surveyed its members and others about the future of the flag ahead of the referendum - and received its "largest postbag ever".
"As the UK's national flag charity the role of the Flag Institute is to facilitate and inform any national debate about its flag - nothing more complicated than that," the Flag Institute's chief executive Charles Ashburner.
Here are 12 of the best suggestions from the public.
1. This design exchanges the blue of Saint Andrew's Cross with the black of the flag of Saint David, the patron saint of Wales.