A de facto Chinese doughnut will soon sit right next to London’s financial center — “the doughnut” being the nickname of GCHQ’s doughnut-shaped headquarters (GCHQ is the United Kingdom’s signals intelligence service counterpart to the National Security Agency).

Last week, after all, Beijing finally received U.K. approval to build its so-called “super-embassy” at the former London site of the government coin manufacturer. The largest embassy in Europe, it will allow for some super spying. Why is the U.K. letting China get away with this?