Iain Dale is Leading Britain's Conversation.
18 July 2017, 15:17
This caller wanted to know why we fly flags upside down to signal distress at sea. James had a rather simple answer.
Why do we fly the union jack upside down to signal distress?
If you only have one flag on your ship and you need to send a message, you’re going to turn it upside down because you can’t do anything else with it!