The Royal Photographic Society no longer accepts film for its International Projected Image (formerly International Slide) competition, though scans are apparently acceptable.
Very disappointing that slides, a stalwart of photography for so many years, are now excluded from the event. The RPS would undoubtedly argue that it's through lack of traditional slide entries, but if they don't allow them, well there certainly won't be any!
Steve (former International Slide Exhibition entrant, but not any more)