London came top in the IESE rankings but only managed 15th spot with SCIR , meaning it enters the Technology chart at five . According to the Cities in Motion Index , London came top thanks to factors including international projection and human capital . Of the 9 criteria measured , London ranked highly in 7 , only falling down when it came to social cohesion and the environment . London Mayor Sadiq Khan launched the Smarter London Together initiative in 2018 , with the aim to make London the smartest city on the world . According to IESE , at least , mission accomplished .