As some of you might know, at Monzo we mainly talk to each other on Slack. (Our December Open Office is actually all about this!)
One of the recurring features of our weekly company-wide All Hands meeting is that whoever’s hosting shares some highlights from the week on Slack. We thought it would be fun to bring the community in on that tradition too 
So, in the spirit of a bit of Friday afternoon silliness, here’s one thing we were chatting about over the past week: 
tea science, or, The Indelible Mystery of the Weird Tea at Finsbury Square 
It all started a couple Wednesdays ago on floor 5 when Tristan, a veteran black tea drinker, could no longer suppress his woes. He wanted to know the answer to the question that haunts us all: Am I alone?
It quickly turned out that no, he was not alone.
And so was born:
Possible suspects included strange teabags, a contaminated water source, and soapy mugs.
Lead investigator James confirmed, using only the most rigorous empirical methods, that it was the latter:
Though Paul wondered whether we had a supply issue:
(We don’t, unfortunately, have Yorkshire Tea in the London office.)
Richard, ever scrupulous, wanted to make sure there had been consistency in experimental tools: 
The final results of the investigation: it was the hard London water in the dishwasher with the limescale 
Tristan was ever grateful.
And that’s all, folks! Happy Friday.
