Hello,
We will be arriving at King's Cross station by train from York on the day before we fly out from LHR. We would like to take the Piccadilly tube from King's Cross to Green Park and then later from Green Park to Terminal 2 at LHR. Question 1: from the tfl map, it appears that these routes would be "step free, street to platform". Can anyone confirm that? Question 2: this day will be our first and only time using the Underground. What do we need to know about paying, and anything else before we show up at the station? Thanks so much. I really appreciate this forum and all of you on it.
Katie