London is officially the world's most expensive city, confirmed a news report you read today, directly conflicting with a report you read yesterday, which said London was no longer the world's most expensive city.
"London is only the world's sixth most expensive city," added another article that popped up in your RSS feed while you were reading this. "Tokyo is more expensive, although London is still expensive" it said, before muttering something about how we should all move to Johannesburg, and offering up some random estate agent you've never heard of as its sole source of information.
"London is actually more — and at the same time, less — expensive than London itself," another report will explain to you tomorrow, publishing a nice big generic London cityscape at the top of the page, for gravitas.
"Essentially, London is expensive," concludes every article you have, and ever will, read.