MOO
The company used to have a compound in Shoreditch where it hosted Summer parties every year. But it has now moved its London headquarters to Farringdon, just down the road from where it started life.
The new office space used to belong to a bank (it may even be bombproof), and it includes lots of colourful details, a workshop, and an ice-cream fridge.
MOO says that it took 32 weeks to refit the 35,000 square foot space, and it's still not quite finished.
See inside MOO's new London office: