Hanway Street was the darkly lit curved lane that connected Tottenham Court Road to Oxford Street, and the location of the Italian restaurant La Bella Donna. By 1985, however, the street no longer lead to Tottenham Court as it was blocked by a combination of scaffolding, skips and piles of bricks. (PROSE: The Quantum Archangel, Millennial Rites, The Crystal Bucephalus)
Real world location
Though it's possible that a real world location doesn't exist in the same geographic space in the Doctor Who universe, such cases are few and far between. Thus, the map at right is probably a good indicator of the DWU location of Hanway Street.