I have read in certain guide books that there is a Hotel Express bus that starts where Heathrow Express ends and stops at various central London hotels. I will be staying at The Ruben at the Palace. Does anyone have any experience with this bus and does it stop at the Ruben? How much does it cost. I will be arriving in London on Thursday and the current weather forecast for Thursday is rain so I'm wondering how difficult it will be to get from Heathrow Express terminus to my hotel. Any advice will be greatly appreciated.