According to my calculations, this should take the dyslexic police cadets 22 weeks or more to listen to. This assumes they do nothing else during their 8-hour shifts although I suppose you could continue listening to lectures during potty breaks.
A police spokesman described the training-with-iPod scheme as "really worthwhile as it accommodates the needs of those officers with hidden disabilities such as dyslexia who would find it difficult to digest such a vast amount of information in written format."
I may be way off base here, but I can't imagine listening to, let alone digesting, 900+ hours worth of training material, dyslexia or no.
Special spell check thanks to Jon Grimshaw