You can't walk for more than five minutes in the UK without tripping over some nonsense like this. History is very important, and traditon has its place, but really? As a brit I find it all kind of tediously performative sometimes.
https://community.pearljam.com/discussion/71416/tradition-go...
b) In case you are one of today's Lucky Ten Thousand, this is a reference to the real-life Ceremony Of The Keys[1]
[0] https://xkcd.com/1053/ [1] https://www.hrp.org.uk/tower-of-london/history-and-stories/t...