The architecture is distinctly Victorian or Edwardian red brick, which is highly characteristic of London. The yellow road markings (double yellow lines) are a classic indicator of the United Kingdom. The overcast sky and general urban density further support a major British city. I suspect this is in a central or affluent residential area of London, such as Kensington or Chelsea.

I am 85% sure this is in London, United Kingdom.

then: forward

The sign on the building clearly reads "Queen's College," which is a well-known institution in London. The architecture and street markings confirm this is a high-end area of the city. The "SLOW" road marking and the specific style of the building entrance are very characteristic of the Harley Street/Marylebone area. I am now very confident in this location.

I am 95% sure this is in London, United Kingdom.

then: guess