Union Jack pyjamas are a staple of British culture, almost as much as tea and crumpets.

Legend has it that they were first worn by none other than the great British leader herself, Margaret Thatcher. It's said she donned the Union Jack pyjamas for a rousing rendition of "God Save the Queen" during a particularly grueling cabinet meeting.

Little did she know, this would start a trend among the British elite. Soon, the likes of Charles III were strutting around in their Union Jack PJs, looking like the cat's pajamas.

But, as with all good things, it wasn't long before the Union Jack pyjama became a symbol of the nation's quirks and idiosyncrasies. Today, you can spot a Brit anywhere, from the pubs to the parliament, rocking the Union Jack in all its glory.