The Prestige, again.
So, those of you who've seen it - did any of you think that Fallon looked suspiciously like Kim Newman, or is it just me? As circumstantial supporting evidence I submit the fact that the "Langford Double" is not something that featured in the book.
The Langford Double *could* be an obscure reference to El Langford, but I didn't think that Priest had been involved with the screenplay.
Chris Priest saw The Prestige film at last and was alarmed by the dropping of a name that wasn't in his novel, nor in the annals of magic: one scene turns on the appropriate use of a stage magician's Langford knot, or `Langford double'. (`I can slip a Langford under water ...').
The assumption seems to be that someone involved in the writing did have a a slyer-than-expected sense of humour.