My gut feeling would be Chesham/harrow/rayners lane/hammersmith/edgeware/earls court/green park/stockwell/embankment/elephant/bank/aldgate east/liverpool st/bon

My gut feeling would be Chesham/harrow/rayners lane/hammersmith/edgeware/earls court/green park/stockwell/embankment/elephant/bank/aldgate east/liverpool st/bond street/baker/kingsx/cockfosters A route out to Epping via Newbury Park would be another option though, probably elephant/bank/kingx/green park/bond instead.