Headlands School as Platform One
Apparently some pickup shots of Platform One were filmed here, but it is unknown exactly what.
Source: The Doctor Who Locations Guide
“The End of the World” Filming Locations
Doctor Who episode “The End of the World” was filmed in Cardiff in the United Kingdom.
Temple Of Peace as Platform One
Rose and the Doctor visit a space station to watch the end of the Earth.
Source: The Doctor Who Locations Guide
BBC Broadcasting House as Platform One (ducts)
The Doctor and Jabe talk while traveling to the core of the space station.
Source: The Doctor Who Locations Guide
Queen Street as 21st Century Street
The Doctor takes Rose back to her time after watching the Earth be destroyed.
Source: The Doctor Who Locations Guide