What Is the British Equivalent of The New Yorker?

Martin Schneider writes:
Happened to stumble upon Andrew Orlowski’s paean to Wired, in which he writes in passing, “In Britain we’ve never had the equivalent of a Harper’s or a New Yorker—something with a cracking 15,000-word article that you can read in the bath.” Is that true? What’s the closest periodical—glossy or otherwise—that can deliver such an Anglo-aquatic reading experience? The London Review of Books, perhaps? Any others?