Mobile phone MASSIVE plot hole
This was so incredible, I literally stopped the film and rewound it to rewatch on more than one occasion just to ensure I wasn't going bonkers / missing something...
Anyway, she's recording Terrace Stamp on her mobile phone, runs up the stairs holding her mobile phone, yet when she hits street level the mobile phone has sensationally vanished without explanation!
Mere seconds later - in fact the very next scene - she is calling her Gran from a telephone box! It's absolutely astounding and makes absolutely no sense...
Potential "plot holes" do get overplayed somewhat on this site I feel but this was really something else.