I tried this on the 'other' forum and I'm hoping for better results here. I've been to London before. I've taken the express trains before. This time, I'm leaning toward a cab for various reasons but am trying to get a feel for what the travel time will be. I know times vary, and I know during the week they can be lousy. I'm thinking that Sundays will be quite a bit less busy since not as many people will be commuting in for work. On a typical Sunday, how long is the typical commute between LHR and Piccadilly Circus? Does anyone have recent experience?