Secret police house

The red dot marks (in rich folk enclave—St Georges Hill, Walton on Thames, south London), a MI5 house with quite a few levels underground. Disguised as a normal residential, redbrick house with fake couple living there.

They spent years building it, and good place, as there are no people walking in there, just about closed to public, by car anyway.

Be interesting to know what they have underground.

Secret police HQ (MI6), taken last week on a trip up river. Green glass windows. Fits the bill looks wise.