Here in London, it’s fair to say we have an embarrassment of riches for film fans – as well as Dolby Cinemas, and huge digital IMAX screens we also have two of the country’s three venues that can show IMAX 70mm film, namely the London Science Museum IMAX and the BFI IMAX, which are currently being put to their ideal use by projecting Christopher Nolan’s new epic, Oppenheimer.