im relatively new to punting, and havent done a walk up yet, but lisle street appeals because it feels slightly more discreet than other ones. I think I went to 2 lisle street to see, and the maid said (the maid was an older white Londoner) the girl was 'big tits and blonde'. I guess the girls alternative with the walk-ups. I tried the second one (4 lisle street?) and the maid was a less friendly ee girl, younger, and confirmed a brunette. Cant remember the name, but perhaps this sophia was at 4. Both were with clients at the time and i didnt fancy waiting around