You don’t expect a major piece of contemporary art outside your office. It’s half way down Newman Street, off Oxford Street if you want to see it.
I’m surprised he got away wiith it as it’s right next to the entrance of the Royal Mail sorting office where the security is usually quite tight.
In theory he should be caught on the CCTV. Perhaps the Royal Mail can sell the footage to the Tate Modern and it can be displayed as an installation in its own right!