If you are an owner of polymer £5 note with the AA01 prefix, It could be worth over 40 times it's face value!
The Queen was presented with the first note leaving a further 999,998 fivers bearing the AA01 prefix (AA01 000001), After her!!!
From the Independent article:
''There are 440 million new fivers printed but not all of them have made it into circulation yet, so it’s possible that lower-numbered notes may still appear in cash machines.''