I previously visited London in 2009 and stayed in Paddington which I liked. I mainly chose it because I was concerned about getting from Heathrow with my luggage without having to use steps. This worked okay as I used the Heathrow Express and could walk to my accommodation. I have been occasionally reading the forums and I note that many of you think that there are better places to stay than Paddington. I hope to visit again 2015 (yes, a long way ahead but I'm a planner) to celebrate my 60th birthday. I have noted that the area around Russell Square looks very central and there seems to be quite a few reasonably priced hotels close by. My question, finally, is would I be able to catch the tube from Heathrow to, say, Russell Square without needing to change lines and without encountering stairs? I've checked the tube map and the Piccadilly Line looks like it runs directly from Heathrow to Russell Square (and beyond) but I'm not sure if this involves a change. I would be very grateful for your advice on this matter.