Andrea Gordon from the Care Quality Commission said:
"We were pleased to see some improvements had been made and it is important that these are now embedded and sustained.
"However, we also found the trust needed to carry out more work in relation to how it assesses and assures itself of the quality of its own service. In light of this CQC has issued a warning asking the trust to ensure improvements are made in relation to this.
"Our inspectors will be returning in the near future to check on whether this further work has been effectively completed."
More top news
Police investigating the murder of a grandfather from West Ham have arrested a second man on suspicion of murder.
Police are appealing for information after a woman was killed and three people injured after a crash in east London.
A restaurant where pets and their owners can share a meal together has opened just in time for Valentine's Day.