Yay, this blog was the second result for that! It's like something from Harry Potter. Perhaps the students at Hogwarts are a bit strapped for cash and are desperately looking for cheap ways to get into London. Thinking further about this, if you had a magic wand, wouldn't you be able to use it to turn itself into an Oyster card anyway?
Word of warning. Don't look up "scared whipping tube" on Google.it - it brings up some really unsavoury results and this blog.
Finally, to the person looking for "older woman looking wanting (you can guess what goes here) in Earls Court", glad you made it to the 37th entryof Google's search results to find this blog. I'm sure it didn't help you, but top marks for persistence.