Construction of four new passageways as part of the Northern Line Extension means that trains on the Bank branch will not stop at Kennington for five months.
Transport for London (TfL) said that the station will be closed to Bank branch passengers from the end of May to mid-September to allow the new tunnel connections to be made.
TfL director of major projects Stuart Harvey said: “Running Bank branch trains through Kennington without stopping will allow us to build the additional passageways we need in the quickest and least disruptive way possible, and are essential to enable customers to access the new Northern Line Extension when it opens.”
Once complete, the passageways will make it quicker and easier for customers to change between different branches of the Northern line at Kennington, and will be essential for those using the new Northern Line Extension from Kennington to Battersea Power Station, which is due for completion in 2020.
TfL has said that the Victorian-era Bank branch platforms at Kennington are simply too narrow to enable this essential work to be safely completed behind hoardings while keeping the platforms open.