Quatermass and the Pit -(Aka 5 Million Miles To Earth ) - sci fi -1967

Hammer films third Quatermass movie.
Workmen tunnelling a subway extension at Hobbs End discover a pit filled with what appears to be human skulls and bones, further tunnelling uncovers alien artefacts. Which The British Rocket Group's Professor Quatermas and a small team of archaeological scientists, investigate.What they discover may completely change the accepted history of man kinds evolution, and threaten it's continued existence.