Loving this on the Tube

Has anyone else noticed the fun true or false posters put up by transport for london on the tubes?? I'm actually loving them. Very intriguing indeed. Especially the one about the spiral escalator in 1907..and the first one that I saw saying only two tube stations have all the vowels in their names.. Still wanting to double check that myself, and so I have grabbed a tube map specially to do just that. Now all I need to do is make some time for it. For those who want to find out now...then here's the link for the answers: TUBE OR FALSE?