I got the cell phone bit straight away, as it stood out a mile in a 'British' drama. Didn't get any of the other bits- but really enjoyed it. Apart from Russell Tovey who had a terrible accent, and annoyed me everytime he spoke (which is not good, as he was the victim, and I was supposed to care about him, and didn't!). 'Hound' has been adapted for tv/film so many times, was a clever version. But the animatronic dog was crap- looked like an aligator.
Think the 'Morse' Code pun was a play on 'Moors' code? (the flashing lights being code between doggers on Dartmoor, perhaps
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