Due to the Northern Line extension works, the Bank branch trains will not serve Kennington station from May to September.
From TfL press release
Bank branch trains will not stop at Kennington station from Saturday 26 May until mid-September 2018
Northern line customers are advised that from Saturday 26 May until mid-September Bank branch trains will not stop at Kennington to allow four new customer passageways to be built as part of work on the Northern Line Extension.
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.
