I really thought that you were here: https://www.google.de/maps/@51.5111861,-0.1054787,3a,75y,4.9h,91.82t/data=!3m6!1e1!3m4!1sd27kBdrnPCCaYmjztLM5RA!2e0!7i13312!8i6656!6m1!1e1

Royal Mail , London

But the walls and doors do not really match...

mainenigma is perfectly right! Congratulation!
https://www.google.de/maps/@45.4315854,-75.6986186,3a,39.1y,221.21h,90.65t/data=!3m6!1e1!3m4!1sANjiG6Q9p8o7mjjGXVYebA!2e0!7i13312!8i6656!6m1!1e1