Sorry if this is a daft question, and doubly so if this is the wrong place to ask it. I have to travel from Bank to Archway tube station. The live departure board suggests that Northern line trains are running through Archway. However, for the last couple of days the TfL journey planner is adamant that I have to take a series of buses. Is there a glitch with the planner, or am I being an idiot? I don't seem able to get any results that include a tube train to Archway, regardless of my starting point.