the original south quay station opened in 1987 in millwall, and was a standard dlr phase 1 elevated station. it was later extended to permit the use of 2 car trains. the station was constrained by sharp curves at both ends and could not be further extended on its original site. the dlr planned to operate 3 car trains on this line so the station was relocated to a new site over millwall dock. the new site is some distance to the east, so the relocated station is partly in cubitt town.