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Yes, the Waterloo and City line is a very important shuttle between Waterloo and Bank therefore known as city.
Waterloo and City Line is a shuttle in London. It's also called the Drain.
Sort of. I use it sometimes to get between Waterloo and Bank.
2 stations: Bank and Waterloo
Stansted Express into London Liverpool Street On the tube, Central line to Bank then Waterloo & City line to Waterloo South West Trains to Southampton