Elmo
I think LTF is having trouble because VIctorian London has a circle that runs across multiple screens. It creates multiple exits to the same screen.
I have an approach that I haven't tested yet that you might try. Thereotically, if there was a tile on the screen, LTF would send you to the tile before an exit. So think of Victorian London as a set of screens that you have to test one at a time. Start at the beginning of the location. Test LTF. Pick up any tiles it finds until it finds no more tiles on the screen. Then go on to the next screen (ignoring whatever LTF does).
Continue through each screen in the London circle, basically testing each screen and ignoring LTF if it heads to an exit.
Don't forget to also do the spinster's house... the treasure part location.
