I am trying to help my 2 sons that are currently in London. They were able to see city highlight today but only have tomorrow, Monday June 30th left. They were hoping to be able to do the Jack the Ripper tour with London Walks but it is at the same time as their West End show. Is there another guided walk someone can recommend that would get into the nooks and crannies of the Old City complete with interesting historical narration? I supposed they can wander a bit on their own hoping not to get lost in the maze, but it would be so much better if they got some of the history along with it. They do have the Original Bus Tour booked tomorrow as well if that needs to be taken into consideration. Thanks so much. All suggestions are appreciated!